Fitting TRVs to Microbore

lortab online cheap valium order xenical buy soma free mp3 ringtones cheap prozac albuterol online lipitor sagem ringtones buy cyclobenzaprine cheap propecia free samsung ringtones levitra cheap ambien free alltel ringtones verizon ringtones polyphonic ringtones cheap cialis ericsson ringtones ortho online wwe ringtones clomid online mp3 ringtones cheap vigrx clonazepam online online nexium adipex online cialis online free ericsson ringtones qwest ringtones verizon ringtones order sildenafil adipex online free kyocera ringtones nexium online midi ringtones free cingular ringtones free nextel ringtones cheap nexium mono ringtones free cingular ringtones tenuate online sony ringtones cheap ambien cingular ringtones tracfone ringtones cheap xenical cheap flexeril zoloft online cialis online buy hoodia cheap prozac but valium cheap albuterol cheap hgh rivotril online cheap xanax cyclobenzaprine online cheap diazepam cialis online order flexeril free sprint ringtones cheap zyban free tracfone ringtones valium online hydrocodone online cyclobenzaprine cheap vigrx propecia online cheap rivotril norco online free ringtones sony ericsson ringtones cheap vigrx free mp3 ringtones free mtv ringtones free sagem ringtones free tracfone ringtones sony ringtones cheap levitra nexium ambien tracfone ringtones hydrocodone online ambien online but phentermine cialis ortho online midi ringtones alprazolam online order lipitor wellbutrin online pharmacy online samsung ringtones cool ringtones free funny ringtones free alltel ringtones fioricet online free nokia ringtones paxil online lortab free sony ericsson ringtones free polyphonic ringtones lipitor online order ortho free cool ringtones cheap prozac hgh online viagra online jazz ringtones cheap sildenafil free sony ericsson ringtones online hgh free sagem ringtones ericsson ringtones cheap viagra buy tramadol adipex online polyphonic ringtones cheap hgh cheap xanax viagra online order hoodia norco cheap alprazolam cheap ativan cheap hydrocodone order ultram xanax sony ringtones free verizon ringtones sony ericsson ringtones free punk ringtones zanaflex online free music ringtones free music ringtones viagra online order hydrocodone cheap xenical free sharp ringtones hgh online phentermine online celexa online free ringtones order hgh cheap celexa nokia ringtones free motorola ringtones buy soma motorola ringtones cheap tramadol buy cyclobenzaprine norco online celexa online cyclobenzaprine online ultram online order propecia celexa online verizon ringtones xenical online ambien cheap albuterol cheap ultram cheap ultram tramadol online cheap ambien cheap carisoprodol free mp3 ringtones online norco buy vicodin sony ringtones hoodia online sildenafil online cheap vicodin motorola ringtones jazz ringtones free qwest ringtones cialis online cheap ambien lisinopril online verizon ringtones cheap valium ultram online meridia online cheap levitra xenical online cool ringtones ortho online xanax online online fioricet but fioricet nokia ringtones online lipitor free mono ringtones diethylpropion online sharp ringtones free jazz ringtones diethylpropion online cheap phentermine hydrocodone online This article is about fitting Thermostatic Radiator Valves to microbore pipe used in Central Heating systems. It is equally applicable to fitting manual valves and lockshield valves when reworking or extending an existing microbore system.

The approach described here uses a standard 15mm valve and a soldered 15mm*8mm or 15mm*10mm fitting reducer (e.g. BES 6786 or 6787) to connect to the microbore. This avoids the difficulties that are likely to occur trying to fit a new 8mm or 10mm valve to existing pipework: because microbore copper is very soft the pipe is often found to be distorted when the old valve's olive is removed making it very difficult to get a good seal to the new valve. Even if the pipe is not distorted it is very easy to over-tighten microbore compression joints resulting in leaks. Because this method uses soldered joints the heating system must be drained down to below the level of the valves being replaced.

TIP: If planning to replace several valves on an existing system check the diameter of pipe on all valves to be changed: often systems have a mixture of 8mm and 10mm pipework.

Insert a fitting reducer into the valve so that the olive sits in the middle of the reducer (see pictures of the soldered-up connector, below) and tighten so that the olive grips the reducer.

Line up the TRV body with the existing valve body and mark the microbore for cutting to fit into the reducer.

Cut the microbore where marked: in this instance a junior hacksaw is used as there isn't space to use a wheel-type cutter

Unscrew the old valve body and tail from the radiator (this saves undoing the valve from the tail and then using an L-shaped hex key to unscrew the tail).

Clean out the tapping in the radiator. A wet