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Warranties and Guarantees

In the rare situation you discover a problem/issue with our workmanship, you should inform us immediately. We will attend within 48 hours minimum, if immediate attention needed we will attend ASAP. In the event of a leak we recommend you turn the water supply off immediately. Please do not attempt to fix the problem as this will void our insurance

We offer a 6 months’ workmanship guarantee on all works provided.

Valliant offer 5-7 years’ warranty on all of our new boilers. In order to comply with this, systems must be cleared of all sludge/debris and therefore power flushing is highly recommended. A magnetic filter must be fitted to prevent future debris build-up from entering the boiler.

To keep your warranty valid, all boilers must have a yearly service undertaken.

All quotes are valid for 30 days.

Giles Gas & Plumbing Ltd hold public liability insurance of up to £2 million.

Pipe Sizing and Pressure Loss

Gas Safe states that the below must be followed when installing new boilers:

The gas pipe system must be sized so that it can supply all the appliances simultaneously with a maximum  pressure absorption of 1 mbar from the gas meter outlet to all appliance inlet connections. Assuming the working pressure at the gas meter outlet is 21 mbar this will ensure that the appliances are supplied with their design pressure of 20 mbar. It must be stressed that this is working pressure, not standing pressure. Please note: your new boiler may not comply with the above and the pipe size may need to increase to comply with current regulations. This procedure would need to be carried out as additional work.

Central Heating System Power Flushing

The core component of a heating system is the boiler. When this part is renewed, the boiler manufacturers’ benchmark scheme requires that the system be thoroughly cleansed to the BS7593:2006 Code of Practice. Currently, the best industry practice is considered to be to power flush a system.

Power flushing is the fastest and most effective way to flush heating systems and also involves minimal disruption and dismantling

  • We use purpose-built power flushing pumps which are designed to cure the circulation and boiler noise problems caused by accumulations of sludge, corrosion deposits and scale which are found in the most ageing of central heating systems.
  • The power flushing pump is temporarily connected into a heating system during the flushing process. The high-water velocity, combined with instantaneous flow reversal, dislodges and mobilises sludge and corrosion deposits. Having loosened any debris, the pump then expels it from the system to waste, using a high velocity flow of fresh water.
  • Radiators are individually flushed without removal/disconnection from the system. After the power flush, the system is full of clean water and re-instatement to normal operation takes a few minutes.

A power flush can be extremely effective in cleaning systems that have corrosion problems as a result of design fault, but we strongly recommend that any such faults are rectified before the procedure commences. The success of a power flush will depend on the level of heating system corrosion which has occurred beforehand. The process will cure most circulation problems but cannot undo the corrosion and gradual decay which has led to the need to power flush the system.

Whilst it is rare for a heating system to experience leaks after the process has been carried out, is it not possible to inspect a system internally beforehand and therefore the need to use a flushing and dispersing chemical for effective cleansing means that we may occasionally discover a leak. The advanced stage of corrosion required for such a situation means that the leak would occur imminently – even without a power flush. We believe that it is better for this to occur whilst we are present to remedy the problem as opposed for it to arise over a weekend/while the house is unoccupied.

Systems which have been neglected over a period of time or have not been treated with an effective corrosion inhibitor, may have severely compacted corrosion debris in the pipe work, radiators or boiler and it is possible that following a power flush, some radiators may still not be fully effective or boilers on the margin of failure may cease working altogether due to sludge and debris later breaking loose and collecting in the heat exchanger.

Please note: the price that we have stated allows for a standard power flush only and if any of the above or similar problems/defects arise during or after the power flush, we cannot hold ourselves responsible in any way. Any further work required would be carried out at an additional cost.