Yea you basically want a 2 port solenode like below.. but to site your fittings.
Then yea fit between needle valve and res box.
https://rover.ebay.com/rover/0/0/0?m...2F362128747272
Cheers
Kallen Westbrook
Bidja (5th November 2017)
BigRAWesty (5th November 2017)