I am having flowback problems with the ultraflow surge damper with pressure switch fitted to my Coachman 2008 535 VIP. Would inline nrv solve this, and how is the easiest way to replace the damper. Many Thanks.
As far as I'm aware the surge damper is an just empty vessel who's function is to even out pressure spikes in the system. I therefore don't see it as causing a problem with flowback, that's more likely to be youir non-return valve not closing properly.
I had thes when our van was on it's second trip and as we were in France and the dealer talked me throuigh it. There was a small piece of plastic stuck in the thing, removal sorted it out completely.
The first job is to find it, it may be part of the water inlet housing, inside the pump head, (if you have an on board pump) or in-line somewhere. Open it up, most come apart, if not try blowing through it both ways.
Dave.
------------- Never argue with an idiot, they will drag you down to their level and beat you on experience.
Mark Twain.
The damper is simply a cylinder into which water from the pump flows. A piston is restrained by a spring allowing water to enter until the piston reaches the limit of travel. This raises the pressure, activating the pr4essure switch to switch off the pump.
The spring pressure then feeds the water under pressure to the taps until the cylinder is empty when the cycle repeats.
We have our very own system like this in Bristol Harbour. It's a bit bigger but supplies hydraulic water pressure to operate cranes, lock gates and a ship haul out slip.
The damper bit is weighted by 80 tons of scrap metal providing the pressure. The plant still works with pumps etc but the old wooden hydraulic pipes have rotted away. The functions are now operated by electric.
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Topic: Truma surge damper
