Hi Guys,

I'm considering getting some instant water heaters and these will be connected to a rain shower (well a small 8 inch one). I understand that water pressure is really important for rain showers and was just looking through some water heater specifications. In particular those instant heaters with pump, they have the following:

Min. Water Pressure : 0.14kg f/cm2 (2psi)

Max. Water Pressure : 3.87kg f/cm2 (55 psi)

While some seems to include the following spec:

Min. Operating Water Flow: 3 Litre/min

Max. Operating Water Flow:7 Litre/min

Max. Water Pressure:6.5 Bar

In regards to the above values, just wondering are they indicative of the maximum output pressure due to the pump? Or does it indicate the maximum water pressure and flow that the heater is allowed to operate with?

I was hoping to find some indication what is the maximum water pressure that the heater's pump can produce but can't seem to find any indicator. Hopefully you guys could guide me in the right direction? Thanks everyone!

Instant heaters are not designed to work with rainshowers. There are cases of blown/burst instant heaters on such installations.

Edited January 6, 201115 yr by neubie