Watts Heavy Duty Float Valve - 1/2" and 3/4"

All bronze bodies

Built to last, these float valves feature all bronze bodies and high tensile manganese bronze arms that are serrated for quick and easy adjustment of water level. Valves operate with single lever action that eliminates any possibility of jamming. Rugged, economical plastic floats are standard with a maximum temperature rating of 140°F. Copper floats for sump temperatures to 200°F are available.

Watts heavy duty float valves are rated for 180°F inlet water temperature and up to165 psi water pressure depending on the length of float rod and float diameter. Valve/rod/float combinations listed below have been selected to accommodate 90 psi water service, which is more than adequate for most domestic water applications. See our website for a complete listing of valve and stem combinations for inlet pressures up to 165 psi, as well as repair parts.


Plastic Float

Copper Float


Heavy Duty Float Valves - 1/2" and 3/4"
Water inlet connections on sizes 1/2" and 3/4' are FNPT x male straight thread on the OD with locknut and gasket for bulkhead mounting if desired. You also have a choice of smooth or MNPT discharge configurations. Stems for the 1/2" valves measure 1/4" x 10" and have 1/4-20 threads on both ends. 3/4" valve stems measure 5/16" x 12" with 1/4-20 x 5/16-18 threads. The plastic float measures 6" inches in diameter. Copper floats are also listed as options.

For a complete float valve assembly, order (1) valve body, (1) stem and (1) float.

Watts Heavy Duty Float Valves- 1" thru 2"



QTY VWA10008

Valve Body, Valve Inlet FNPT: 1/2", Outlet: Smooth

QTY VWA10009

Valve Body, Valve Inlet FNPT: 3/4”, Outlet: Smooth

QTY VWA10010

Valve Body, Valve Inlet FNPT: 1/2”, Outlet: MNPT

QTY VWA10011

Valve Body, Valve Inlet FNPT: 3/4", Outlet: MNPT

QTY VWA10017

Brass Stem for 1/2" Valve Body

QTY VWA10018

Brass Stem for 3/4" Valve Body

QTY VWA10019

6" Diameter Plastic Float for 1/2" Valve Body

QTY VWA10020

6" Diameter Plastic Float for 3/4" Valve Body

QTY VWA10025

Copper float with 1/4-20 connection for 1/2" valve

QTY VWA10026

Copper float with 5/16-18 connection for 3/4" valve