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Marley, Qmark, BerkoGenuine OEM Part

Marley Linear Limit 4520-2018-005 Qmark, Berko Parts

Part # 4520-2018-005
Limit
Fits 86 models

6-foot linear limit for Marley, Qmark and Berko heaters.

$59.67

Ships Monday from Carroll Parts

In stock

Genuine OEMFactory original part
Same-Day ShippingIn-stock orders by 4 PM Central
90-Day ReturnsSee return policy
Expert Support800-654-3545Mon–Fri, 8 AM–5 PM Central

SKU: Y4520-2018-005 Categories: Marley, Marley Qmark Berko Heater Parts, Limits

Compatible Models

The Marley 4520-2018-005 fits 86 models. Type your model number to check.

Don’t see your model? This list may not include every model this part fits. Call 800-654-3545 or email [email protected] and we’ll check compatibility for you.

Marley 2506
Marley 2506A
Marley 2506B
Marley 2506NWC
Marley 2506NWCA
Marley 2506W
Marley 2506WA
Marley 2506WB
Marley 2506WC
Marley 2506WCA
Marley 2516
Marley 2516A
Marley 2516B
Marley 2516NWC
Marley 2516NWCA
Marley 2516W
Marley 2516WA
Marley 2516WB
Marley 2516WC
Marley 2516WCA
Marley 2546
Marley 2546A
Marley 2546B
Marley 2546NWC
Marley 2546NWCA
Marley 2546NWCS
Marley 2546NWCSA
Marley 2546W
Marley 2546WA
Marley 2546WB
Marley 2546WC
Marley 2546WCA
Marley 2546WCS
Marley 2546WCSA
Marley 2576
Marley 2576A
Marley 2576B
Marley 2576NWC
Marley 2576NWCA
Marley 2576W
Marley 2576WA
Marley 2576WB
Marley 2576WC
Marley 2576WCA
Marley C2506A
Marley C2506B
Marley C2506NWC
Marley C2506WA
Marley C2506WB
Marley C2506WC
Marley C2506WCA
Marley C2516A
Marley C2516B
Marley C2516NWC
Marley C2516WA
Marley C2516WB
Marley C2516WC
Marley C2516WCA
Marley C2546A
Marley C2546B
Marley C2546NWC
Marley C2546WA
Marley C2546WB
Marley C2546WC
Marley C2546WCA
Marley C2576A
Marley C2576B
Marley C2576NWC
Marley C2576WA
Marley C2576WB
Marley C2576WC
Marley C2576WCA
Marley D1500
Marley D1500A
Marley D1504
Marley D1504A
Marley D1507
Marley D1507A
Marley D1508
Marley D1508A
Marley J1500B
Marley J1503B
Marley J1504B
Marley J1506B
Marley J1507B
Marley J1508B

Need help finding your model number?

About the Marley 4520-2018-005

The 4520-2018-005 is a 6-foot linear limit from Marley Engineered Products. It is used in Marley heaters. A linear limit is an overheat safety control.

This is the 6-foot version. Confirm your heater's length and model number against the compatible models listed on this page.

Installation Tips

Turn off power at the breaker and confirm it is off before servicing the heater. Note exactly how the old limit is routed and connected, and install the new one the same way.

Product Details

Part Number	4520-2018-005
Brand	Marley, Qmark, Berko
Part Type	Limit
Manufacturer Description	LINEAR LIMIT 6'
Condition	New — Genuine OEM
Length	6 ft
Compatible Models	86 (see list)
Availability	In stock
Ships	Same business day if ordered by 4 PM Central
Returns	90 days on new, unused items
SKU	Y4520-2018-005

Not sure this is the right part?Our parts experts will check it against your model number.800-654-3545 · [email protected]Mon–Fri, 8 AM–5 PM Central

Why Buy From Carroll Parts?

Helping Fix Things Since 1938Over 85 years of parts expertise
Same-Day ShippingIn-stock orders placed by 4 PM Central ship the same business day
90-Day Return PolicyBuy with confidence
Real Parts Experts800-654-3545 · Mon–Fri, 8 AM–5 PM Central

Frequently Asked Questions

Will the Marley 4520-2018-005 fit my heater?

It fits the 86 models listed under Compatible Models on this page. If your model isn’t listed, call us at 800-654-3545 and we’ll check for you.

Is the Marley 4520-2018-005 a genuine OEM part?

Yes. This is a genuine Marley factory replacement part, not an aftermarket copy.

When will my order ship?

In-stock orders placed by 4 PM Central ship the same business day.

What is your return policy?

Items must be new and unused. You can return them within 90 days. Please read our return policy before sending anything back. Questions about a return? Call 800-654-3545 or email [email protected], Mon–Fri, 8 AM–5 PM Central.

What Our Customers Say About Carroll Parts

Carroll Parts

4.9

Based on 913 reviews

Jason S.

21 hours ago

My first attempt was buying a less expensive part on Amazon. Huge failure! Didn’t fit properly. I stepped up and went to you guys and it’s perfect. Lesson learned!

Jim K.

3 days ago

It was nice to find a replacement faucet to replace my leaking push button faucet. Better design IMO. Fast shipping, easy to install I'll keep Carroll Parts in my address book!

karin T.

3 days ago

Received our 2 orders in a timely fashion.

Joe R.

4 days ago

Very quick turnaround. Got what I expected on first attempt!

Barbara C.

4 days ago

Excellent customer service! Shipped fast! Part worked great!

John L.

5 days ago

My order was easily placed with the sales associate. Payment was easy, delivery was quick. All Great!

John T.

5 days ago

Got a replacement remote for an old Emerson fan unit that was no longer supported. The new remote works great and I'm delighted Carroll was there to support me. I probably should behave gotten two of them

Richard M.

6 days ago

Exactly the part I ordered and was OEM.

Caroline De W.

2 weeks ago

Easy to order. Quick to arrive.

Chris H.

2 weeks ago

Was able to locate the exact part I needed. They were able to quickly turn around and ship it to me so I could complete my repairs. Really happy I found this place.

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2 weeks ago

Fast and professional. Thank you

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2 weeks ago

They had the exact fan lens that we needed!

M R

2 weeks ago

Part arrived as ordered. No issues

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3 weeks ago

Well packaged and delivered as ordered in timely. Parts exact fit.

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3 weeks ago

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3 weeks ago

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3 weeks ago

Parts ordered were exact fit no issues with order shipping a little pricey

Debra L C.

3 weeks ago

So glad I was able to get the replacement part I needed. Ordering was easy and shipment quick! I’d certainly use again. Thank you

Marlene M.

4 weeks ago

Order was processed, shipped, and completed flawlessly !!

Reuben Jones J.

4 weeks ago

I needed a switch for my vacuum cleaner and it worked out perfectly. I will use your company again.😊😊👍🏾 and delivery was fast

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4 weeks ago

Fast, professional service.

Matthew N.

4 weeks ago

Easy to order, shipped quickly, showed up when it was supposed to. Would definitely use this company again.

Larry M.

4 weeks ago

Fast service, no b.s., but most important was having hard-to-find parts.

LauraLou M.

2 months ago

We needed a new “end piece” for our under-sink hot water heater dispenser. I got on the internet and started asking questions and was directed to your site. I was directed to where I could find the information you needed to get me the proper color etc and voila! Now I have the part. Thank you for making something that seemed impossible to find a much easier task than I assumed it would be.

Daniel W.

4 months ago

We needed a new motor to fix our bathroom exhaust fan which had since been discontinued. They had the old part and shipped it quickly. I installed it and it works perfectly. They saved me hours from having to uninstall & then install a new exhaust fan setup!

Keith E.

5 months ago

Great job ordered over the weekend.The order was filled First business day, andand I was notified immediately when it was shipped. Package arrived in a very reasonable amount of time via ground transport. Can't imagine experience being any better. Thanks.

Buddy G

8 months ago

I needed the OEM part. My first attempt on Amazon sent a Chinese part and it didn't work. You guys sent the correct part. Perfect. The bummer was that shipping charge was more than twice the cost of the part. Still, I'm happy with the ease of the web purchase and fast shipping time.

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9 months ago

The website was user-friendly, and I found everything in excellent condition. Shipping was timely and well-packaged. Would purchase from here again.

Matthew B.

9 months ago

My in-laws instant hot started leaking and when I researched the issue, Carroll Parts was tagged in a repair video and a link to the exact part I needed. Ordering was super easy, the part came a day early, and the leak was repaired in a few minutes!

D D.

9 months ago

My Insinkerator instant hot water dispenser arrived on time, and as described. I had found for a few dollars less on Ebay but had less confidence in the supplier. I am happy with my purchase as it was easily installed in about ten minutes as replacement for the old one. Be sure and note that this unit is for the heater ONLY, no additional hardware, hoses, dispenser, etc. It was what I needed; be sure that is all you need.

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9 months ago

I contacted the kitchen faucet manufacturer for a replacement defective part. They were NO help. But I found what I needed on Carroll Parts easily for a great price and super fast shipping. Carroll is now my "go-to" parts house.

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10 months ago

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Richard J.

10 months ago

Pretty simple, my Instahot tank blew the heater and I needed a replacement. Every other place only wanted to sell me a completely new unit (with an unneeded faucet). Carroll had exactly what I needed, at a reasonble price, and shipped it on time. Highly recommended.

Lyle K.

11 months ago

Generally a very good transaction. The website is excellent and even had an install video. The selection of OEM equipment is great and so is the pricing. My only complaint is that shipping costs were higher than I expected, but it was FedEx so I thought that was OK. It came USPS….

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11 months ago

Carroll Parts was great in helping us find a hard to locate part. After the sale they maintained excellent communications and tracking support. Great company to do business with.

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11 months ago

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12 months ago

Easy to find this hose for my old Craftsman vacuum. Looks like the stock, original piece and much thicker and heavier than the last replacement I found at one of the home centers. Good find, shoulda' bought two.

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12 months ago

I ordered three (3) as they were inexpensive and . . . my neighbor has the same model! She was thrilled, and put a new blade on her X-acto knife (a furniture maker) and carefully removed the baffle, as I did, then dropped the replacement in. Cheers all around! So, No. 3 is the neighborhood spare. I used a Magill forceps (I’m a medical writer and interviewer) in the past to remove foreign objects that fell in, while the neighbor always had a pair of long needle nose pliers handy. We both agreed that it was “about time” we had a removable/replaceable baffle. (Yes, yes, we always always unplugged the unit, even flipped the breaker, before diving in.)

Robert T.

12 months ago

Service was outstanding. The only issue was the failure of USPS to deliver the product within the originally stated time window of Oct 31 or Nov 1. It arrived Nov 6 or 7. Perhaps an Amazon delivery would be better for your customers.

Bill S.

12 months ago

Hard-to-Find Parts, Fast and Hassle-Free I was blown away to find replacement parts for a Craftsman shop vac that’s easily 15–18 years old. Carroll Parts had exactly what I needed. The ordering process was smooth, shipping was fast, and everything arrived well-packaged and in perfect condition. It’s rare to find a company that stocks legacy parts and delivers top-notch service. Highly recommend for anyone trying to keep their older tools running strong!

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12 months ago

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1 year ago

Quick delivery, excellent price, great communication and a large volume of parts available. Perfect transaction. Thank you!

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1 year ago

Requested a tank-only for an old model In-Sinkerator and Levi gave me a quick answer, a timely delivery, fair price. The tank was easy to install, and it operated correctly.

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1 year ago

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1 year ago

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1 year ago

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1 year ago

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1 year ago

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Karen K (Karen K.

1 year ago

I ordered an "InSinkErator 76694 Stopper Cover Control Plus" to replace the previous one I had. I provided the part number to the Customer Service person I spoke with. Unfortunately, the part # I had no longer exist. However, per my description of the part, the Customer Service person was able to locate the identical part (different number). My order was fulfilled immediately and arrived in just a few days. The fit and function is perfect! I am happy the part was in stock and arrived so quickly. Thank you!

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1 year ago

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1 year ago

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1 year ago

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1 year ago

Great customer service!

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1 year ago

I ordered a specific part and it came correctly on time

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1 year ago

Parts were shipped in a timely manner and without problems. part worked and we're up and working

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1 year ago

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1 year ago

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1 year ago

Had the parts I required for a 21 yo fan. Ordering was straight forward and shipping was quick and received on time. The part worked perfectly and I am pleased to have fan and lighting functional again.

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1 year ago

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1 year ago

Easy to order and arrived on time. Would have been even better if the price was lower.

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1 year ago

Exactly what I needed. Thank you.

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1 year ago

Replacement instant hot water dispenser came quickly. I found no other supplier offering just the heater. It was significantly less expensive than buying the heater and faucets.

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1 year ago

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1 year ago

I was slightly disappointed when I ordered the right part for my discontinued Craftsman shop vac. I ordered a replacement blower wheel that actually fits a Rigid. The problem was the one sent was only a 1/4" between the impeller and my original wheel was 3/8". Good news is the Representative found the correct wheel. Back in business. I however, had to pay for return shipping.

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1 year ago

Was initially sent the wrong part, after specifically asking if the part # would work for my replacement. We shipped the incorrect part back and received the new one yesterday. So all is good.

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1 year ago

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1 year ago

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1 year ago

Part came and it fit perfect

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1 year ago

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1 year ago

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1 year ago

staff was very helpful with my questions and led me to a successful fix of my problem.

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1 year ago

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1 year ago

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1 year ago

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1 year ago

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1 year ago

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1 year ago

Found exact OEM part for my older Shop Vac at Carroll Parts. Manufacturer site listed this part as no longer available. A phone call confirmed part was in stock at Carroll. I then placed an online order and received the part shortly after. The part was an exact fit and function as the original at a price cheaper than non-OEM parts found on other sites. I've ordered from Carroll in the past with the same great results.

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1 year ago

I found a hard to find part on Carroll Parts website, ordered it and received it as they promised.

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1 year ago

Part Fitted well.. thanks

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1 year ago

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1 year ago

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1 year ago

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1 year ago

Excellent communication with customer service. Parts fit perfectly

Chantal L.

1 year ago

We are very satisfied with the part. It works perfectly. But the shipping cost was expensive, double the price of the purchased item. Especially since we are Canadian and have to pay for the exchange. Thank you.

john C.

1 year ago

The part fit my craftsman shop vac perfectly. Thanks for your suggested switch. I was told by craftsman that the on off switch was no longer available. Thanks for saving me the cost of a new shop vac.

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1 year ago

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1 year ago

Parts came on time and packaged well

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1 year ago

Good price & fast shipping

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1 year ago

Parts arrived later than originally forecast. fit was good. Shipping cost more than parts. Could have shipped USPS for less

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1 year ago

The part I needed delivered quickly.

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1 year ago

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1 year ago

Install was easy and vacuum now works !

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1 year ago

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1 year ago

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1 year ago

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1 year ago

Great customer service!!!

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1 year ago

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1 year ago

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1 year ago

I shouldn’t have to pay more in shipping than I did for the actual part.

Mark M.

1 year ago

They had the part that I was searching for. I received it when they said that I would and the part was exactly what I was searching for. I installed it and the heater is working perfectly. Thanks 👍

alvin B.

1 year ago

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Joseph R Spadea J.

1 year ago

Shipping was too expensive, otherwise a great service.

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1 year ago

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Rick M.

1 year ago

Replacement blower wheel for 25 year old craftsman shop vac fit perfectly. Up and running again like new.

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1 year ago

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1 year ago

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1 year ago

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2 years ago

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2 years ago

I received what I ordered in good condition. Worked well when installed.

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2 years ago

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2 years ago

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2 years ago

Only place I found on line to replace broken handle to hot water dispenser.

William T.

2 years ago

Very good delivery with the right part sent for my kitchen sink, though the price did not totally "drain" me, like everything in plumbing, especially the plumbers themselves, it seemed a wee bit expensive. Appreciate your service.