Ask Gary arc systems Hes our expert of water heaters.
Just read instructions says water connection male connectors to suit a 12 mm r/f hose.hope this helps
Post last edited on 24/03/2013 11:35:23
------------- the only silly question is the one you do not ask.
3/8" hose will fit but the fittings are 12mm so more designed for 1/2" hose.
Make sure either hose is fully on to the serrated part of the fitting and clip is also used here.
The smooth part of the fitting being only for attaching 'push-pull' semi rigid pipe fittings.