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http://www.heatandplumb.com/acatalog/copy_of_3m_KBB_Fire_Valves.html Or just google ...."KBB Fire Valve". Suggest that you use a KBB. They come with different length sensor capillaries. You need to measure from your boiler to wherever you want to fit the valve. (The one above is for instance...

Sorry for butting in Graham. KOM Yes you can do it yourself. Find the (hopefully) braided flexible pipe. This is the filling loop. It should have an isolation valve at both ends, one from the rising cold water main and the other into your pressurised system. First find these things. The...

Sorry JD. My first answer did contain the actual point of "why" we fit a fire valve. Quote. "The valve is there to cut off the oil supply to the interior of the house should a fire develop in the boiler casing. It is nothing to do with protecting the oil tank." However it may have been...

Put simply, the fire valve is to stop all the oil from your tank flooding into your house if, for instance, the rubber oil supply hose inside your boiler gets burnt through due to a fire. I imagine that even in Estonia, 2,500 litres of oil on fire inside your kitchen would render the house a...

You must have a remote acting fire valve fitted to oil boilers. The sensing phial is fitted inside the boiler case, above the burner and the valve itself must be outside the building. (ensure that it is the correct way up as indicated on the fitting instructions when you buy one.) It is...

Oh by the way I assume that the Riello is a RDB because the information that I've given is for RDBs.

The pre-purge or pre-ignition phase should last 12 seconds. Then for the subsequent 5 seconds, the ignition phase, the fuel pump solenoid and the ignition should be energised together. Normally it is only after this 17 second period you will get a lock -out if ignition does not occur. If you are...

I agree with plugwash. An inductive load resists all changes in current flow ( it's magnetic field either collapsing or expanding acts to maintain the status quo) So on switch-on the build up of current is slow but the inductive load tries to maintain the current flow when you switch off, thus...

Like Alpem I've cut it by scoring (quite deep on both sides ) then putting it on the edge of a bench or table (and putting a straight edge plank of wood on top - plus a bloke standing on it for big 4 to 6 foot lengths!) then, wearing gloves and using both hands, a very quick, confident, snap...

GS38 is more to do with the construction of the leads than the top end safe voltage. For instance, after repeating the warnings about the only circumstances when live working is permitted, it details the small contact area of the probes, finger guards to stop your pinkies sliding onto a live...

http://www.hse.gov.uk/search/googlecoop.htm?q=Guidance+Note++GS38&sa=Search&cof=FORID%3A11&cx=015848178315289032903%3Akous-jano68#1390 It cost £3 something to download!!

I read your problem and, like most others, I'm intrigued. From what I gather the noise is heard by you from the TV (etc) power supply and not the speakers ( there is a subtle difference, reference possible causes). This seems to be confirmed by the fact that the meters for flat 5 & 8 are also...

Since you asked. A ring circuit MUST be one complete ring. It can have spurs off of it but it CANNOT have a full parallel circuit as shown in Option 1. Option 2 is correct. Do not forget that a new circuit or an addition to a circuit like this is notifiable!! You are not allowed to DIY this...

If the fan spins freely and the motor will not now turn electrically, bearing in mind that you've changed so much kit, including the capacitor, I'd go for a motor change. A complete new burner will cost!

The impellor can be damaged if it is twisted during removal. It's unlikely that this guy has a suitable puller. If the impellor is jamming / rubbing against something, then removing the motor will mean that any defect in the impellor area will be out of the frame. Or no?

We are getting somewhere! The motor is rated at 2,850 r.pm. if you don't have the gear to measure it, the term "going like the clappers" should apply. It has to turn a crude axial fan fast enough to create quite a high air flow. So then we are down to the motor / fan assembly. ( Do not give up...

It would be nice to get a fuel pressure reading from the fuel pump but I take it that you do not have the gauges for this? The manual for this burner is available on the Riello web-site if that helps. http://www.rielloburners.co.uk/ I take it that you have done fuel availability checks. i.e...

What model burner are we talking about? I take it that the "vent" is the semi-circular(ish) cover that shuts off the air inlet to the burner fan when the burner isn't running. If it is and it isn't opening then try bleeding the line to the little cylinder that is attached to it. The "vent"...

Lutron have a nice range. Contact them about a plate to mount three units. some Lutron dimmers are available from Screwfix. http://www.lutron.com/default.aspx?cntid=1

Gentlemen please. A single phase a.c. motor has a capacitor connected across its supply, to an auxiliary field to provide a starting torque. ( There is no need with a 3- phase motor [for instance] because each phase is sequential to the last and so therefore provides torque to turn the motor in...