[andyralph]

hi all my pump packed in on fri 100 psi my mate gave me his spare 75 psi pump will it make much of a difference thanks andy

[Paul Coleman]

hi all my pump packed in on fri 100 psi my mate gave me his spare 75 psi pump will it make much of a difference thanks andy

If you use half inch hose, shouldn't be a problem.  If you use smaller bore, may notice a slightly reduced flow - especially on very high work.  It ought not be a problem.