Warren Webster Steam Traps and Capsules

Inverted Bucket & Float and Thermostatic Steam Traps & Repair Kits

For Warren Webster two-pipe steam systems, BoilerSupplies.com lists radiator steam traps, replacement capsules for the radiator traps, and F&T kits for Webster float and thermostatic traps. Banging pipes, hot returns and uneven heat in an old two-pipe building can trace back to a failed Webster radiator trap. Building engineers order the parts radiator by radiator. Photograph the trap body and the old capsule first, since the body markings tell which capsule it takes. Match the listing, or send the photos for a quote.

About Warren Webster Radiator Traps and Capsules

Warren Webster and Company of Camden, New Jersey, made vacuum steam heating equipment, and the thermostatic trap was the most important of its specialties. Webster two-pipe systems went into large buildings across the country, and many of their radiator traps still serve older schools, apartment blocks and churches.

BoilerSupplies.com lists three families for Warren Webster equipment: radiator steam traps, replacement capsules, and float and thermostatic kits. A radiator trap sits on the return side of each radiator and holds steam in until it condenses. The thermostatic capsule inside opens on cooler condensate and closes on steam. A capsule goes into a trap body that stays piped in; a whole radiator trap replaces the body as well. The F&T kit carries the internals for a Webster float and thermostatic trap: the float that drains condensate and the thermostatic element that lets air out.

Key facts

Warren Webster and Company of Camden, New Jersey, made vacuum steam heating equipment.
The thermostatic trap was the most important of the Warren Webster specialties.
BoilerSupplies.com lists radiator steam traps for Warren Webster systems and replacement capsules for Warren Webster radiator traps.
BoilerSupplies.com lists float and thermostatic kits for Warren Webster F&T traps.
A radiator trap whose capsule has failed open lets steam into the return, which can show up as banging.
In-stock small-pack orders placed before 2:00 PM EST, Monday through Friday, ship the same day.

Is a Webster trap element the same part as a capsule?

Yes. Element and capsule are two names for the thermostatic part inside a radiator trap, the piece that opens on cooler condensate and closes on steam. Some are built as a bellows, which is where that name comes from. BoilerSupplies.com lists replacement capsules for Webster radiator traps, and radiator traps for Webster systems.

Why are the return lines hot on a Webster two-pipe steam system?

One common cause is a radiator trap passing steam because its capsule has failed open. Steam in the return pushes against the condensate, and that can show as banging and uneven heat. A new capsule goes into each trap that passes steam, and BoilerSupplies.com also lists whole radiator traps for Webster systems.

When does a Webster system need a whole radiator trap instead of a capsule?

When the trap body itself is past reuse, which is a call for whoever is on site. A capsule replaces only the thermostatic element, and a replacement radiator trap replaces the body too. BoilerSupplies.com lists both for Webster systems, so one order can mix capsules and whole traps radiator by radiator.

How do I find out which capsule a Webster radiator trap takes?

Start with the markings cast into the trap body and cap. The old capsule, photographed next to a ruler once it has come out, settles the rest. Note the trap's pipe size and whether it is angle or straight, and send the photos and the count through BoilerSupplies.com with the order.

Write down the trap body markings and how many radiators need a capsule or a whole trap, then send the list and photos through BoilerSupplies.com. For a building-wide order, call 1-770-957-9599 or toll free 1-800-780-3776.