dave1967 Posted May 22, 2022 Share Posted May 22, 2022 Got a Baxi boston which is being replaced in my new house. Should I rip all the pipes out too and start again its all 15 mm and i presume its. apprx 50 years old and a lot of rad will need to be moved. Link to comment Share on other sites More sharing options...
Nickfromwales Posted May 23, 2022 Share Posted May 23, 2022 (edited) 9 hours ago, dave1967 said: Got a Baxi boston which is being replaced in my new house. Should I rip all the pipes out too and start again its all 15 mm and i presume its. apprx 50 years old and a lot of rad will need to be moved. Hi Dave. 1000% yes mate. The pipes will be full of corrosion / crud / ferrous particulate from that long a service lifespan, and when you fit the new appliance that will ultimately get back to it, regardless of how good a magnetic / particle filter you fit. I would completely re-plumb and replace all the rads / valves, plus also look at a good controls system ( not Honeywell Evo-home!!! ) to manage it all economically. If you approach someone like www.mrcentralheating.com and ask for a package price for boiler / rads / valves / TRV ( thermostatic rad valves ) then you can get a yardstick on prices when plumbers come to quote. Take the room sizes / number of outside walls / number of windows / ceiling height etc into any decent plumbers merchants and they will size the rads for you room by room FOC ( when you ask them for a quote ). Edited May 23, 2022 by Nickfromwales 1 1 Link to comment Share on other sites More sharing options...
Nickfromwales Posted May 23, 2022 Share Posted May 23, 2022 (edited) New gas run in 22mm also, unless the existing one is already 22mm. If it's a long run, it may need to start with, or include along its length, some 28mm pipe, eg to get the manufacturers stated "working gas pressure". Will you be installing a combi or a system boiler plus hot water tank? Do you have / do you intend to fit solar PV? Edited May 23, 2022 by Nickfromwales Link to comment Share on other sites More sharing options...
ToughButterCup Posted May 23, 2022 Share Posted May 23, 2022 11 hours ago, dave1967 said: ... Should I ... start again ... Yep, down to the foundations ....🤪 If you need to ask the question, the answer is almost always ....yes.... Link to comment Share on other sites More sharing options...
dave1967 Posted May 23, 2022 Author Share Posted May 23, 2022 15 hours ago, Nickfromwales said: New gas run in 22mm also, unless the existing one is already 22mm. If it's a long run, it may need to start with, or include along its length, some 28mm pipe, eg to get the manufacturers stated "working gas pressure". Will you be installing a combi or a system boiler plus hot water tank? Do you have / do you intend to fit solar PV? Cheers Nick. Will rip it out. Got a 2.5kw solar system on 2011 tarrif. Fitted with 2 sunnyboy inverters for some reason. All got a magic heating box which will be going on ebay as i cant see what it does. Link to comment Share on other sites More sharing options...
Nickfromwales Posted May 24, 2022 Share Posted May 24, 2022 8 hours ago, dave1967 said: Cheers Nick. Will rip it out. Got a 2.5kw solar system on 2011 tarrif. Fitted with 2 sunnyboy inverters for some reason. All got a magic heating box which will be going on ebay as i cant see what it does. OK, so you will be keeping ( replacing ) the hot water cylinder for excess PV diversion to hot water, great. What is this ‘magic heating box’? Can you show us pics as I’m at least very curious. Name / make / model etc? Cheers. Link to comment Share on other sites More sharing options...
dave1967 Posted May 24, 2022 Author Share Posted May 24, 2022 Just google magic thermodynamic box or look on ebay. Link to comment Share on other sites More sharing options...
Nickfromwales Posted May 24, 2022 Share Posted May 24, 2022 3 minutes ago, dave1967 said: Just google magic thermodynamic box or look on ebay. Ah, just a bloody expensive low loss header / mini buffer tank. Do you have any UFH? Link to comment Share on other sites More sharing options...
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