How to fit a Shower Power Booster to 3/4 pipe.You can fit a SPB directly onto 3/4 inch copper pipe if you buy 22mm to 3/4 conversion olives from your local plumbers merchant. All 22mm brass compression fittings are supplied with 22mm olives. To fit to any 3/4 pipe using a 22mm fitting all you need to do is take out the 22mm olives we supply and replace them with 3/4 to 22 mm olives 
If the plumbers merchant close to you does not sell them tell them they can buy them from the biggest manufacturer of brass compression fitting in the UK.Flowflex sell to merchants though-out the UK
https://flowflex.com/ Tel 0129877211
The big stores will not have a clue what you are talking about so you will probably need to go to a a specialist plumbers merchant.Take along either the SP2B and explain what you want to do.
Use a Slip Joint when there is no pipe movement in 3/4 pipeYou need a slip joint to make fitting a SPB easy and we sell them with our Shower Power Boosters
https://showerpowerbooster.co.uk/product/22mm-compression-slip-coupling/
Decide on a place where you can cut the pipe and fit the slip joint.Mark the pipe using the slip joint as a templateCut the pipe half way between the two marks.
Decide on a place where you can fit the SPB.Mark the pipe using the SPB as a templateCut the pipe at the mark furthest from the slip joint and remove the unwanted 110mm of 3/4 pipe.
Fit the SP2B pump and piece in the 3/4 pipe but remember to slip the coupling over the last piece of pipe.Move the slip joint to where you marked its final position and tighten the compression nuts.
Please Note: The OD of 3/4 pipe is 19.05.
Kind Regards
Alan WrightInventor of the ShowerPowerBooster