These valves are manufactured and assembled using an 'O' ring and a shuttle.
They are far superior to the standard spring and ball valves that are generally available commercially.
Inline 5/16" x 32 Oil Check Valve to suit 3/16 pipe £6.95 (3 in stock)
Inline 1/4" x 40 Oil Check Valve to suit 1/8 pipe
£6.75 (3
in stock)
Inline 1/4" x 40 Oil Check Valve to suit 5/32 pipe £6.75