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Bronze float valve with transparent body and 3/4 inch pipe mount

Watts

Watts ST750 Float Valve 3/4 In Bronze Pipe Mount Transparent

SKU CH-PKXY-509G3

Bronze float valve with 3/4 inch NPSM connection handles 40 gpm at 50 psi and 60 gpm at 100 psi up to 125 psi and 180 degrees F

  • ColorTransparent
  • Bronze body resists corrosion for long service life
  • Transparent housing lets you see float operation at a glance
  • 3/4 in NPSM connection fits standard plumbing without adapters
  • Delivers 40 gpm at 50 psi and 60 gpm at 100 psi for strong flow
  • Withstands up to 125 psi and 180 Degrees F for demanding installations

Watts ST750 Float Valve

The Watts ST750 is a bronze float valve designed for pipe-mount installation with a 3/4 inch NPSM threaded connection. It suits plumbers and facility managers who need reliable liquid-level control in tanks or reservoirs. The transparent body allows visual confirmation of the float position without disassembly.

Thermals Noise Power

Operating temperature reaches a maximum of 180 degrees Fahrenheit while the valve handles pressures up to 125 psi. The bronze construction resists corrosion and the brass rod withstands normal system vibration. No moving parts generate audible noise during standard flow conditions.

Sustained Load Behaviour

At 50 psi supply pressure the valve passes 40 gpm and at 100 psi it passes 60 gpm, maintaining consistent shut-off across the range. The bulkhead mounting and threaded outlet keep alignment stable during continuous cycling. California Proposition 65 warnings apply for chemical exposure.

Highlights

  • Bronze body resists corrosion for long service life
  • Transparent housing lets you see float operation at a glance
  • 3/4 in NPSM connection fits standard plumbing without adapters
  • Delivers 40 gpm at 50 psi and 60 gpm at 100 psi for strong flow
  • Withstands up to 125 psi and 180 Degrees F for demanding installations

Specifications

ColorTransparent
BrandWATTS

Questions about this item

How do I install the 3/4 in NPSM threaded connection and what is the common mistake?

Thread the bronze body onto the 3/4 in NPSM pipe using pipe sealant on the male threads; the step often missed is tightening the mounting bulkhead nut after the valve body is aligned so the float arm moves freely.

Which parts will need replacement after extended use?

The brass rod and bronze valve seat are the wear items; mineral build-up on the seat can cause leakage, and the rod threads may strip if the float is forced, so plan to replace the seat washer and rod assembly periodically.

At what pressure does the valve reach its flow limit during continuous operation?

At 125 psi maximum pressure the valve delivers 60 gpm; sustained operation above 100 psi will push flow past 60 gpm and accelerate seat wear, so 100 psi is the practical continuous-use ceiling.

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