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Plumbing and Gas News

Practical tips for maintenance, service and repairs of plumbing and gas appliances

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Maintenance and Service


Baxi Combi 105HE - loosing pressure fast

Baxi Combi 105HE boiler is loosing pressure very fast. First of all check that the filling loop which supposed to top up the central heating system with water was closed. Then you should check the expansion vessel charge it should be around 1bar. If there is no charge or water is coming when you pressed the nipple then replace or recharge it with the pump up to 1.5 bar. Top up the system up to 2 bar and watch the pressure discharge pipe outside the property if its constantly dripping or pouring water then Pressure Relief Valve have to be replaced. The part number is 248056 and you can order it from here. To replace this part you don't need a gas engineer.

Baxi Combi 105HE manual: PDF


Thermal Store Cylinders

Pulsacoil 2000 - Electric Thermal Store

Electric Thermal Store Pulsacoil 2000 doesn't produce any hot water. No hot water coming from any tap in the property. We are making several checks first. Check fuses and electrical supply to the boiler. Check that the header tank is half full with water, if water is at the very bottom then top it up and check performance. Switch it on, open a hot water tap. Is plate heat exchanger getting hot?

  1. If the plate heat exchanger is cool then we need to check the immersion heaters and thermostats. Isolate the electrical supply, put thermostat target temperature on maximum and check for continuity between "in" and "out". If now continuity the thermostat have to be replaced.
  2. The rod thermostat (7") part number is XB003/XB081. You can order it from here.

Boiler manual: PDF


Space Heaters

Baxi Brazilia F8S

Balanced flue gas wall heater Baxi Brazilia F8S brocken control knob. For this particular model F8S you will need a long version of the control knob. The replacement part number is Baxi 234643 control knob assembly. To replace this part you don't need a gas engineer. In order to fit the replacement part correctly simply remove the casing by pulling it upwards. You can order it from here.

Wall heater manual: PDF



Glowworm Xtramax HE

Combination boiler Glowworm Xtramax HE with a hot water storage cylinder discharges a lot of water from the Temperature and Pressure Relief Valve (T&PRV). After I turned the power on and put a hot water demand approximately after 10 seconds when a secondary, hot water pump start working but all hot water taps are closed and water in the storage cylinder is cool the top T&PRV start discharging lots of water continuously.

  1. First check that the hot water expansion vessel which is located in the bottom right corner of the boiler is charged with air up to 3.5 bar. There is only one screw is holding it. Remove the cup from the nipple and press. If water start coming from the nipple then you need to replace the expansion vessel.
  2. If expansion vessel is OK then replace the T&PRV. The part number is 0020018589. Not many suppliers keep this in stock. It is going to be a special order which might take up to 4 working days. You can order it from here.

Boiler manual: PDF



Mira Crescent Cheltenham

Mira Crescent Cheltenham concealed thermostatic shower is constantly dripping from a shower head. The shower valve has a ceramic discs Flow Cartridge Assembly which has worn out. The part number for the flow cartridge is 441.56. To replace the cartridge you will need to isolate cold and hot water supply's. The cartridge can be ordered from here.


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