Recent content by John_D

gossip gas mains are 6 bar round here to try steal oil customers the hyperlinks were interesting I work in oil

flexi pipes should not be kinked twisted crushed or tied in knots! you will have to cut the existing pipes or get shorter flexi tails or of course bend copper pipes and solder tap connectors

Corgi is a small dog I register my unventeds online with OFTEC

okay so do you prefer to talk in terms of electrons moving from outer atomic rings and the number of free electrons defining the resistance and how they migrate through copper wires? The trigger to action is the signal received in this case line voltage of 230v +10% -6% :?

A stat is a temperature switch, the programmer sends live to the switch (stat) which then sends the live to the boiler or to the motorised valve which then sends live to the boiler I find the crowbars in the porridge too crunchy

oops sorry folks decimal pointer slipped :shock:

Diversity can be applied to cookers because there is an oven heater, and separate ring heaters, you probably won't be using all of them at the same time. In a shower you can only choose stage 1 or stage 2heating. A 9k5 shower on stage 1 heating will probably not trip a 32A breaker on a 6mm cable

All partition cavity walls are filled with insulation now as part of L1 building regs so I always assume current standards. To quote a different standard for a lower quality building situation is risking legal liability

16th regs part 110-04 The regulations are non-statutory regulations. they may, however , be used in a court of law in evidence to claim compliance with a statutory requirement. The relevant statutory provisions are listed in Appendix 2... resting against one wall of an insulated space...

has the mains pressure increased and the boiler cannot heat the increased flow. Also does your bath have temperature limiting valve as is now a requirement in Scotland for safer bathing

if the mains is low pressure, standard unvented won't work either you need 2 bar at 20lpm You could go OSO Dualstream it will work from 5lpm and provide hot water subject to a boiler or electrical heating. This is an unvented system and must be installed by a competent person and registered...

is the cold water storage cistern higher ? I have had 2 cylinders with internal leak recently. The CWSC water goes into the DHW cylinder and enters the heating coil through the leak, then rises to the F&E header and overflows out of the warning pipe the radiators also get warm to the...

Condensing is requirement since Apr 2005 on gas this means most mfg have new designs and not history. Only Keston have been condensing for years what about their C36

one for the pumped ch one for the gravity water heating means 2 separate boiler circuits and a fortic hot cylinder the 10mm pipes will go into a manifold under the floor what DP said was set the programmer and check if the boiler fires make sure the stats are set high