An `in-line´`check´ or `non-return´valve,
with a parallel, male, gas, pipe-thread union at each extreme. The
3/4" version is also available with a 1" female gas pipe-thread
union at the input. This is aimed at ease of installation on existing
systems. These valves are specifically designed to prevent backflow
once the central heating pump is switched off. Whilst the stainless
steel spring is very `light-weight´ and provides very little
resistance in the forward condition, it is sufficient to pervent
`thermo-circulation´ in the forward direction due to residual
This short, compact valve has been specifically
desiged for ease of installation in general applications, and specially
for flow meters and hot water boilers.
||Body: Drop forget machined
||Spring: Stainless steel.
||Plastic: Injection mouled, Hostaform acetalic
||O-ring: EPDM (Ethylene-Propylene).