Runs with Bison
Member
Do any of you have access to/can point me in the direction of Delta shower mix valve performance curves? These are 1994 vintage, single knob, don't know the model number, but believe they are pressure balanced/compensating. I'm looking for pressure drop vs. flowrate for the valves.
The reason for this is that I'm trying to troubleshoot some low flow readings I'm getting from some showerheads. House pressure with one running appears to be 60-68 psig depending on which floor the shower is located. I've worked through pressure drop for the piping with line sizes and equivalent lengths, so the only remaining unknown is pressure drop across the shower valve. I'm wondering what it should be...vs. what I might see if I insert a tee and gauge in the shower arm to read the pressure during shower head operation.
Presently, I can't explain why the flows are so far off the new showerheads' performance curves.
The reason for this is that I'm trying to troubleshoot some low flow readings I'm getting from some showerheads. House pressure with one running appears to be 60-68 psig depending on which floor the shower is located. I've worked through pressure drop for the piping with line sizes and equivalent lengths, so the only remaining unknown is pressure drop across the shower valve. I'm wondering what it should be...vs. what I might see if I insert a tee and gauge in the shower arm to read the pressure during shower head operation.
Presently, I can't explain why the flows are so far off the new showerheads' performance curves.