had a forge dump valve cheap today and was wondering if its the twin piston type they recomend for a scoob , i have opened it up and there is a blue nylon piston with o rings with spring and a white like stopper with a spring ,behind the blue nylon there is a a silver spring not red or blue like most mention on here , can anyone help pls .
cheers mark

 

has it got any code or numbers etched onto it mate ?

 

no nothing at all

 

hmm, thats a bugger. i know somebody with a twin piston forge, i'll try and find their email and tell em to look at your piccy, as they had theirs apart to shim it.

ian

 

cheers..

 

top

 

yes its a twin.
Stu

 

Indeed it is. The white piston is the non-return valve, the blue piston is the main blow off valve.

 

thanx guys .