Hi vin - been using them for around 5 years - no fittings just 1" bsp female threads I reduce down to 3/4" and screw on hoselock fitting in and hosetail fitting for 1/2" pipe out ( I jubilee clip the pipe as I feel it's
Safer than relying on a hoselock
If you know your water pressure aps will reccomend the size of pump best suited for you,
This is the one I use...
https://www.anglianpumping.com/product/water-boosting-pumps/jet-112m-230vDarran