Elbow fittings & flow loss

[Spinny]

About a year ago we replaced our lead water pipe with a new 32mm MDPE connection. This resulted in the flow through our outside tap being good at 37 l/m - tap connected off the internal 22mm mains copper pipe using 15mm copper pipe.

 

Since then the piping to the tap was changed as a temporary measure to plastic with various connectors. It now has 5 right angle elbows on the temporary pipe run (see pic). When I measure the water flow it is now 27 l/m - a 27% flow reduction.

 

I therefore conclude that each elbow is reducing flow by about 2 l/m.

 

My plumber has already fitted one 90 degree press fit elbow on another pipe run and the flow there seems lower than other internal taps.

 

I presume I need to tell my plumber to stop using 90 elbows and to use only swept bends if I want to maximise flow ?

 

 

[dpmiller]

a plumber did that?