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Topic: Truma surge damper

firebasher

21/4/2021 at 8:46pm
Location: West Yorkshire
Outfit: Land Rover DiscoveryCoachman VIP 535 4

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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.

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Pickled Onion

22/4/2021 at 12:30pm
Location: Near Alton Towers
Outfit: Bailey Burgundy S7 H

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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.

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Give a man a fish and he will eat for a day,
Teach a man to fish and you can get rid of him for a whole weekend.

firebasher

22/4/2021 at 12:49pm
Location: West Yorkshire
Outfit: Land Rover DiscoveryCoachman VIP 535 4

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Thanks for your reply I will try this.

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Smoke alarms save lives!

navver

22/4/2021 at 7:54pm
Location: West country
Outfit: Mondeo

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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.

https://wikimili.com/en/Hydraulic_engine_house,_Bristol_Harbour

Pickled Onion

23/4/2021 at 11:43am
Location: Near Alton Towers
Outfit: Bailey Burgundy S7 H

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Thanks for the heads-up navver, that all makes perfect sense, you learn something new every day.

Dave.

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Give a man a fish and he will eat for a day,
Teach a man to fish and you can get rid of him for a whole weekend.

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