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Dunkirk PSB5D Cast Iron Natural Gas Boiler

SKU: 389071

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Save 28% · Retail: $3,352.00

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About the Dunkirk 355001000

Dunkirk PSB5D Cast Iron Natural Gas Boiler. Since the late 1920's, Dunkirk has delivered innovative, efficient and dependable home heating systems to professionals, building owners and homeowners. This is the best way to deliver heating equipment that lasts and reduces home heating costs. Dunkirk's Plymouth Steam (PSB) Boiler offers a great combination of heating comfort, efficiency, and Dunkirk dependability. Additional features include an electronic low-water cut off, and electronic ignition.

Product Details

Product: Boiler
Fuel Type: Natural Gas
Mpn # 355001000
Weight 440.00 lbs.

Product Features

  • 355001000
  • Input of 150
  • Heating Capacity of 122
  • AHRI of 92
  • AFUE % Rating of 82.0
  • Flue Diameter of 6"


4.5 out of 5 rating is our rating for PlumbersStock, we got that rating because we have lots of experience and great people with expertise in plumbing. BUT WE WANT YOUR HELP. This product doesn't have any reviews yet, and we don't want to write our own reviews. It is more valuable to us that the customers get to share their experience with our products. Please, if you have any experience with this product, take a moment to share and help someone else who is trying to make a decision. Thank you!

Questions & Answers


Good day! We appreciate your interest in our Dunkirk 355001000 PSB5D Cast Iron Natural Gas Boiler. This boiler’s maximum input capacity is 150,000 BTU. Its DOE heating capacity is 122,000 BTU. The Net 1=B=R capacity is 92,000 BTU. If you wish to purchase this product, be sure to click Add To Cart to confirm your order! We also invite you to sign up to receive our newsletter and discover fabulous discounts by keying in your email address in the space provided at the bottom right of this page. Thank you for shopping with – the perfect place to find high-quality products at low, low prices!


Good day! We appreciate your interest in our Dunkirk PSB5D cast iron natural gas boiler. No, what we have is the Dunkirk PSB9D cast iron natural gas boiler. This boiler's maximum input capacity is 299,000 BTU. Its DOE heating capacity is 245,000 BTU. You may refer to this specification sheet to know more information about the product. The conversion is 1 MBH is equivalent to 1,000 BTU. If you would like to purchase this item, just click on Add to Cart. Enter your zip code to get a shipping cost estimate and proceed to checkout to begin the ordering process. Thanks for choosing as your online shopping buddy. Have a great day!


Hi, there! Thank you for taking interest in our Dunkirk PSB5D natural gas boiler. This boiler has two 2-1/2" return line connections, one each on the left and right side of the boiler. For more information, please refer to page 5 of this installation manual. Hope this helps. Thank you and we hope to see you again here at!


Good day! We are grateful for your interest in the Dunkirk PSB5D. No, it will not automatically refill the water dispenser. In order for you to have the auto refill for the water dispenser, you will need the secondary part which is the Dunkirk 16300001 Water Feeder. If you'd like to place an order, feel free to click "Add to Cart", fill out the required fields, and you're ready to go. Have a wonderful day ahead!