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PressureSystems - Frequently Asked Questions

Can I send my pump, back to you for repair?
We have a fully equiped workshop. We offer a repair service for all the pumps we supply. Contact us for advice.

Are you the manufacturers of JABSCO pumps?
No. Pressure systems is a division of Cleghorn Waring Pumps, the UK's leading specialist suppliers of JABSCO pumps and products. The manufacturer is ITT Industries - Jabsco, see About Us for more information,

I have a problem on my boat's pressurised water system. Can you help me?
We will do our best to help you, have a look at the points below. If these don't help, please contact us.

My water storage heater keeps pouring cold water out through the pressure and temperature relief valve!

Has this always happened or did it just start recently?
Have you installed a new pump or replaced the pump pressure switch recently?

Check the pressure being created by the pump is not higher than the setting of the pressure release valve. A standard C-Warm unit is supplied with a 2.5bar (35psi) rated valve, the maximum recommended pressure from the pump is 2.1bar (30psi), this allows for some expansion in the system.

If the pump pressure is too high the correct solution is to change your pressure switch for one with a lower setting. Do Not replace the relief valve with a higher pressure unit, this may be incompatable with the heater and cause it to split or explode.

My water storage heater is pouring hot water out through the pressure and temperature relief valve!

Do you have an immersion heater fitted?
If so, check to ensure its thermostat is set in accordance with the instructions and is cutting out correctly.

If you do not have an immersion heater or the spillage occurs when only the engine is in use then it is likely the problem is caused by a lack of expansion in the system. The solution is either to reduce the pump pressure setting or fit an accumulator tank as an expansion tank on the hot outlet from the heater.

The hot water from my water storage heater is so hot I am worried it may injure someone. How can I control or reduce the temperature?

If this occurs when using an immersion heater adjust the setting on the thermostat so it cuts off at a lower temperature.

If this occurs when using the engine we recommend fitting a 'Cylinder Thermostat' or a 'Blender Valve', see 'C-Warm Heater Accessories'.
A 'Cylinder Thermostat' is a valve (like a radiator valve) which locates in the feed line to the heater coil with a sensor fixed to the heater. When the temperature reaches the setting on the valve the line is shut so the water gets no hotter.
A 'Blender Valve' is a valve which is fitted into the hot outlet line of the heater (with a cold feed connected to it). The required water temperature is set on the valve, the valve then blends cold water with the hot to ensure this temperature is not exceeded.

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PressureSystems is operated by Cleghorn Waring which is a division of ITT Industries. Registered England No. 853597. Registered Office : Jays Close, Viables Estate, Basingstoke, Hants, RG22 4BW U.K.