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Iron fill relief valve with union solder inlet and FNPT outlet, test lever on top

Watts

Watts S1450F Fill Relief Valve 1/2 In 30 psi Iron

SKU CH-ZEBC-6WPW4

Combination fill and relief valve for boiler feed lines with 1/2 in connections, 30 psi factory set pressure and 10 to 25 psi range

  • Factory-set 30 psi protects boiler feed lines
  • Adjustable 10 to 25 psi range suits varied installations
  • Iron body with bronze seat resists corrosion
  • Silicone disc and stainless spring handle 0 to 212 °F
  • Union solder inlet and FNPT outlet simplify piping

Watts S1450F Fill Relief Valve

The Watts S1450F is a combination fill and relief valve built with an iron body for boiler feed lines. It accepts a 1/2 inch union solder inlet and provides a 1/2 inch FNPT outlet. The unit is factory set at 30 psi and operates within a pressure range of 10 to 25 psi.

Included test lever and materials

A test lever is supplied with the valve for manual operation checks. Internal components use a silicone disc, a bronze seat and a stainless steel spring. These materials support a temperature range from 0 to 212 degrees Fahrenheit.

Pressure capacity and limits

The valve handles pressure settings between 10 and 25 psi with a 30 psi factory preset. It is not rated for BtuH output and carries no applicable standards listing. Installers needing a different pressure range or a certified rating must select another model.

How it compares

Measured against everything we stock in Faucet Valves & Replacement Parts, at today’s prices. Recalculated every night.

Price $130.99
Pricier than about 70% of the 1,132 comparable items (median $54.99).

Specifications

Product
Brand nameWATTS
Product typeOther

Questions about this item

How often should the silicone disc and stainless steel spring be inspected or replaced on this valve?

The silicone disc and stainless steel spring are the primary wear components. Inspect them during annual boiler maintenance and replace if the disc shows cracking or the spring loses tension, which can cause pressure drift.

What pressure limit does the factory-set 30 psi relief reach first during sustained boiler operation?

The valve opens at the factory-set 30 psi. Under sustained firing, this relief pressure is the first limit reached, discharging water before the system exceeds the 10 to 25 psi operating range.

How much heat does the iron body radiate when the valve runs all day at 212 °F?

The iron body will become hot to the touch at the 212 °F maximum temperature rating. Ensure surrounding insulation and clearances meet boiler-room codes to manage radiated heat safely.

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