Changing to Fully Pumped .

[verdigrey]

Hello everyone ,
I could do with some advice please . I have been to see a gentleman who has an oil boiler heating a 4 bedroomed detached house , He has a gravity primary circuit thru 1" or 28mm pipes to his cylinder and pumped to his rads . He wants me to quote for fitting a condensing boiler . I will obviously have to change it to a fully pumped system , but i am wondering if it would make it more efficient to change the cylinder circuit to 22mm pipework or leave it at 28mm ? Your thoughts please .

 

[stevetheplumber]

Hello everyone ,
I could do with some advice please . I have been to see a gentleman who has an oil boiler heating a 4 bedroomed detached house , He has a gravity primary circuit thru 1" or 28mm pipes to his cylinder and pumped to his rads . He wants me to quote for fitting a condensing boiler . I will obviously have to change it to a fully pumped system , but i am wondering if it would make it more efficient to change the cylinder circuit to 22mm pipework or leave it at 28mm ? Your thoughts please .

i would rerun the primaries as they are usually full of crap and rubbish anyway

 

[Puddle]

As steve says,replace if possible also after flushing fit magi clean or fernox equivilant,have just finished doing the same thing this week,old ideal 1960 floor standing,for new He boiler,replaced pipework, also managed to get him to relace cylinder for new ,lagged and better recovery time,when I drained system, the water was quite clean but when removed gravity flow and return inner pipework caked in sludge
Just off now to do the last making good

 

[verdigrey]

Thank you Steve and Puddle thats just what I needed to know , good point about a filter too , cheers .