Weil McLain 590-735-122 Section Sealing Rope

The Weil McLain 590-735-122 Section Sealing Rope is a 1/4 in. diameter rope, 22-3/4 in. long, that Weil-McLain lists as a sealer for sections. In a cast iron sectional boiler, the joints between sections have to stay gas tight, and sealing rope between the sections is what keeps combustion gases and flue products inside the boiler. Weil-McLain's own online parts catalog lists the 590-735-122 as Sealer For Sections, 1/4 in. rope, 22-3/4 in. length, on the EG-55 and EG-65 section and base assembly pages.

On both the EG-55 (EG Series 3) and the EG-65 (EG Series 2) pages, Weil-McLain shows two pieces required for that assembly and marks the rope as not shown in the drawing, which is typical for a consumable sealing item. The quantity you need depends on the boiler and the joints you are opening, so confirm it against the section and base assembly parts drawing for your model before you order. This is a separate listing from the carried 590-735-140 sealing rope, so match the full part number to your parts list rather than substituting one rope for the other.

Replace the rope any time you separate sections or the base. Old rope that has been compressed and heat cycled does not spring back and seal like new material, and a joint that leaks flue gas shows up as soot and staining at the section joints or a smell of combustion products near the boiler. Clean the joint of old rope and residue, fit the new rope without gaps, and reassemble the sections per the boiler's installation manual. Finish with a combustion and leak check once the boiler is back in service.

Key Benefits

• Weil-McLain Listed Item: Weil-McLain's own parts catalog lists the 590-735-122 as a section sealer for the EG-55 and EG-65, so you are matching a documented part number.
• Exact 1/4 in. x 22-3/4 in. Size: The size is stated in the part number's own description, so you know what you are ordering before it ships.
• Cut Length Ready: The rope is supplied as a 22-3/4 in. piece, exactly as Weil-McLain lists it, so you are not guessing at a cut length.
• Clear Quantity Note: The EG-55 and EG-65 pages list two pieces, so you can plan quantities against the parts drawing for your model.

Common Questions

• What is the Weil McLain 590-735-122? A 1/4 in. diameter sealing rope, 22-3/4 in. long, that Weil-McLain lists as a sealer for sections on its EG-55 and EG-65 section and base assembly parts pages.
• How many pieces do I need? Weil-McLain's EG-55 and EG-65 parts pages list two pieces for that assembly. Confirm the quantity against the parts drawing for your boiler and the joints you are opening.
• Is the 590-735-122 the same as the 590-735-140? No. They are separate part numbers with separate listings. Match the full part number to your parts list.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.