Unions fit Davey SpaQuip Spa Power 400, and 500 controllers. Also fit Raypak Spartan 131, and Ampac Pulsar Tee Heaters. For replacement o-rings: . 

 40mm Suits:

• Piranha circulation pumps

40mm - Piranha circulation pump union, euro circ pump union, ampac pulsar union, ampac union, sp 500 union, spa power 500 union, raypak 131 union, raypak spartan union

40mm SpaQuip Union