So why did you investigate the heater tap? was it dripping ?
I think my heater box has a leak as i can smell hot coolant in the cabin when the motor is warm.

No i haven't done much research into this yet as i only pulled it off this arvo. Thanks for the tip. I'll try them during the week

Have you asked at nissan, i was able to buy a whole heater assm, including core/tap/linkages/hoses everything heater wise.

Ok i pulled the heater tap off the side of my heater and discovered that it is leaking pretty bad. Should i just replace the rubber seals inside the tap or is there a better aftermarket option that i could go for or a car at the wreckers i can pull one out of. The tap is going to be controlled by an electric motor instead of the cable so making up brackets to suit another tap is no issue. Any help greatly appreciated.