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Boiler pressure over 3 bar | DIYnot Forums

2011-12-31 · Hi there, I've been having high boiler pressure (between 2.5 to 3.5 bars) for over a week now. We had a plumber come in a couple of days ago who drained the central heating circuit, added two bottles of inhibitor and filled it back up so that the boiler showed 1 bar pressure.

Boiler Pressure and Central Heating System Pressure - …

If water continued to pass through the 3 bar safety valve and the boiler pressure dropped away, the safety valve would need to be replaced. If the filler loop is disconnected but the boiler pressure still stays too high despite some water having been drained out of the central heating system via a drain cock, the likely culprit is the plate

Combi boiler pressure rises to 3 bar. | Screwfix …

2004-10-6 · drop the pressure of the system to 1 bar when the system is cold.disconnect the filling loop as this should only be attatched when filling. turn on the heating, if the pressure rises to 3 bar then the most likely fault is that the expansion vessel in the boiler has failed.

How dangerous is it if your boiler pressure is well high

2010-2-2 · if you're boiler manual says it's maximum pressure is at or below 3 bar then fair enough (virtually all boiler manuals are available online), but every boiler installation should have a pressure relief valve that's set to relieve pressure before it becomes dangerous anyway, so it's very unlikely to be at a …

Boiler Pressure Valve | eBay

Boiler Safety Pressure Relief Valve. Top quality Boiler Safety Pressure Relief Valve. Fitted On Many Different Types Of Boiler. Choose from 1.5 - 6 bar. Can be used in all heating installations. We do

3 Bar Pressure Relief Valve | eBay

Set relief pressure range from 3.5 to 8 bar. Inlet and Outlet Diaphragm design gives improved resistance against scale. Test Pressure of Body: 25 bar. Bar - 3.5, 4.0, 5.0, 6.0 and 8.0. Not sure which

Boiler running at 3 bar, is that normal? - Plusnet …

@RichardB, what you say is contrary to the other opinions, nothing wrong with that, but thinking about it 3 bar must be an acceptable pressure to operate at if the dump valve operates just on or above it, otherwise the value would have a lower pressure threshold. I do have an expansion chamber on it and it was installed after my dump valve was replaced and that’s been in less than 2 years IIRC.

Boiler running at 3 bar, is that normal? - Page 2

2) drained the boiler using its drain valve (not the pressure releif valve) 3) The pressure vessel has a car tyre schrader valve on the air side, I put my foot pump on the valve and inflated the pressure vessel to 0.8 bar. This forced out 4 litres of water from the boiler. Through the open drain valve. 4) close drain valve and open the feed and

1/2" Safety Pressure Relief Valve - Boiler Heating 1,5 …

1/2" Safety Pressure Relief Valve - Boiler Heating 1,5 Bar, 2,5 Bar, 3 Bar in Tools & DIY - by Perfexim Safety valves are designed to protect systems against exceeding the allowable pressure value.