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Valves & Fittings for Solar Hot Water Systems
Valves are small, cheap, and the cause of a surprising share of solar hot water faults — thermosiphoning at night, no flow, weeping relief valves, or lukewarm water at the tap. We stock the solar-rated valves and fittings Australian systems actually use.
✔ Non-return valves
Stop hot water flowing backwards through the collector and dumping heat overnight.
- AVG solar rated non-return valve NVHT-15F-15C
- Non-return valve to suit Dux, Hills and Conergy systems
✔ Tempering valves
Deliver water to the tap at a safe temperature while the tank stores hotter.
- AVG 15mm tempering valve with insulation (yellow cap) TVA15C-I
- AVG 15mm high performance tempering valve with insulation (orange cap) TVA15CHP-I
✔ Pressure and expansion
- AVG hot water expansion PTR valve 15mm — 850KPA (blue) and 1000KPA (green)
- AVG cold water expansion valve ECV 15mm 700KPA (blue)
- RMC air and vacuum relief valve AVHTS-15
✔ Frost and air
- AVG frost valve — essential in cold-climate installations
- AVG air bleed valve AEHT-10
✔ Unions, fittings and collector connections
25mm x 15mm pump unions (loose nut), 25mm loose nut x 20mm male pump union, Grundfos UPS 20-60 N pump unions, 20 x 15mm brass reducing bush, 22mm compression brass unions for European-size collector connections, 22mm compression tees, and Rheem SFC brass connector kits, end plugs, sensor port kits, O-rings and silicone gaskets.
✔ Flow meters
AVG flow meters in 1.4L and 2.5L — the 2.5L is normally used with evacuated tube systems.
✔ Trade tip
The AVG Tradie Kit bundles unions, non-return valve and flow meter in one pack (pump not included).
✔ Not sure which valve you need?
Email sales@solarhotwaterparts.com.au with a photo of the existing valve and its markings, and we'll identify it.
