heater hose help!

[240slidekat]

i need to know which heater hose goes to which on my rb25det powered s13. i cant just slap them on because the heating system has a one way check valve and some jackass took off my label so i dont know which is which. so if anyone can check their car for me that would be a great help. thanks in advance

[Joe]

one way check valve? wtf? ive never heard of that.

its got a big valve controlled by your climbate control. thats the only valve i know of. its just a flow through system with a stop (valve) you control, and a fan.

[240slidekat]

well when i had my rb running before i had hooked up the heater hose backwards and it built pressure and kept on popping my radiator hose so i switched around it worked like a champ

[300Plus]

did you have the heater turned on or off ? maybe you have them in the wrong order but Ive never heard of a one way check valve in the heater hoses. except the one valve you control with the heater on off switch, like stated above ^