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Small bronze inline ball-cone check valve with FNPT ends

Apollo

Apollo 61-503-01 1/2 in FNPT Bronze Ball Cone Check Valve

SKU CH-WZRM-VVQBG

A 1/2-inch FNPT bronze inline ball-cone check valve rated for 400 psi water and steam pressure between 33 and 180 degrees F

  • Size1/2"
  • TypeOther
  • Reliable backflow prevention with inline ball-cone design
  • Easy installation using 1/2 in FNPT connections
  • Handles hot and cold water from 33 to 180 Degrees F
  • Rated for 400 psi water and steam pressure
  • Durable bronze body with EPDM seal for long service life

Apollo 1/2" FNPT Bronze Check Valve

This Apollo 61-503-01 check valve uses a 1/2 inch FNPT connection and an inline ball-cone mechanism to prevent reverse flow in plumbing systems. The cast bronze body handles water pressures up to 400 psi and steam pressures up to 400 psi WSP. It operates between 33 and 180 degrees Fahrenheit and can be mounted horizontally or vertically.

Inline Ball-Cone Design Limits

The single ball-cone flow design provides a cracking pressure of 0.5 psi, which is the minimum forward pressure needed to open the valve. This low threshold suits gravity-fed or low-head installations but will not act as a tight shut-off under zero-flow conditions. The EPDM seal material determines chemical compatibility and the 180 degree F maximum temperature limit. The valve is restricted from sale in California due to Proposition 65 chemical content warnings.

1/2 Inch FNPT Connection Decides Fit

The 1/2 inch FNPT x FNPT thread size is the single specification that confirms whether this valve matches the existing piping. Installers must verify that both the pipe diameter and the thread standard correspond exactly to this measurement. The bronze body and 400 psi pressure rating support standard residential and light commercial water or steam lines within the stated temperature range.

Highlights

  • Reliable backflow prevention with inline ball-cone design
  • Easy installation using 1/2 in FNPT connections
  • Handles hot and cold water from 33 to 180 Degrees F
  • Rated for 400 psi water and steam pressure
  • Durable bronze body with EPDM seal for long service life

Specifications

BrandAPOLLO
Size1/2"
TypeOther

Questions about this item

Should I pick the 1/2 in FNPT size or is another connection offered?

This valve is only available with a 1/2 in FNPT x FNPT connection, so there is no alternative size to choose.

What does the 0.5 psi cracking pressure mean when the valve is installed?

The valve begins to open at 0.5 psi, allowing flow with very little back-pressure in either horizontal or vertical mounting.

How does the FNPT threading limit the pressure rating in practice?

The bronze body and FNPT threads are rated for 400 psi water and 400 psi steam, so the connection does not reduce those limits.

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