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if we think your system is fully pumped do u have a 3 port or 2 2port zone valves on the system .do u have a room & a cylinder thermostat?

bottle vent will be fine at highest point. allways good idea to put good isolation below it incase it fails. dirty systems over time can weight down the float causing water to leak out.

Big concern fitting new boilers to old systems is to get the old system as clean as possible to reduce contamination of the new boiler. the laid back installer may be cheaper & less work involved but may also not have your best intrests as a priority. New cylinder is a bigger asset that what it...

Not as fast a filler as a regular filling loop. if its on zero pressure u may have lost a lot of water so may fill for up to 60 seconds b4 gauge rises. gauge may be faulty or water may be escaping some where?

everones human & make mistakes. just not all got the balls to admit it. Broke an oven grill glass door last week leaning on it while trying to clean out a multipoint full of soot.then in the afternoon my opo cracked a pan trying to redrill it on concrete. Bad days appen.

if u hav paste dry off the joint & try it . refit joint straight away. I always use a couple of revs of ptfe tape instead. dont mater about being wet then.

if u open the overide switch on the end of the white box and unclip the cylinder stat off the tank u'll get heating when asking 4 hotwater until u fix it

NEW angle what make & model is ya (electric shower) its not a mixer with an electric booster pump is it. long shot. went to 1 last year with water main to it .

If its red its on the heating

probably beat BG to the job though.

get a 15-60 unless uv money to burn. alphas may be clever but i find clever lasts less. time will tell. The pump extensions come in different sizes. Get extra rubber washers if gona use extension as the fibre can be a b1tch to seal if access is poor. ya new grundfoss will come with 2 new rubber...

can u get to all the other rads that r working to turn them off to see if that one will circulate at all when its the only thing on.

can u post a pic of ya pump & zonevalve. if ya hot waters very hot ya pump must be working a little unless ya immersions on.

all i can say is get them back. if they installed it they have a duty of care to see that it operates properly & havent taken enough time checking it out after completion. We all get caught out now & again but should take the rough with the smooth

Roca is good quality at a reasonable price up to expensive.

if its just a bath deck mixer cant see it backflowing into attic unless the outlet was blocked

Theres lots of different options available which can some be decided on cost,space & distance. Fitted a lot of en-suites in a very large bed & breakfast with a poor water supply. we fitted purpose made 60"x 16" lowpressure cylinders into each ensuite each with seperate 1bar pump. each heated by...

as an installer i agree. 2 cylinders in my house & no combi.easy to fit dont mean best.

more info make /model of shower

sounds like a 3 port midposition valve with a knackerd motor stuck in dhw position. Has ya zonevalve got three pipes to it in a T shape.?