Less restriction on the cold side, its direct from the pump to the taps.
Where the hot it needs to go through the heater first which puts some extra back pressure onto the pump, Its probably running a bit slower with the hot side.
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets