Those of you that are saying the water pressure has a baring on the effectiveness of inline heater are not quite on the right track. The rate of water flow through system is the important factor.
It's all in the jets!.
Halelujah! btw: 50ºc isn't gonna do much on grease, if you can put your hand in your wand's spray and not get a nasty red burn, it's just not hot. Call your service warm water extraction, and start scrubbin' your arse off.
