Internal by-pass unloaders, these unloaders feature a bolt on design with internal by-pass system. Adjustable pressure releases pressure in pump head when in by-pass, protecting from over preassuriation. Eliminates by-pass hose and fittings.
| Thumbnail | Model | Max PSI | Max GPM | Inlet | Outlet | Size | Pump Series | By Pass | Injector |
|---|---|---|---|---|---|---|---|---|---|
 | AR20758 | 3650 | 9 | 1/2” F | 3/8" M | XW | Brass | ||
| AR20802 | 3650 | 9 | 3/4” F | 3/8" M | XW | Brass | ||
 | AR22287 | 4000 | 5 | 1/2” F | 3/8” M | 2 | RK, RR, XM | Brass | Adjustable |
 | AR22206 | 4000 | 5 | 1/2” M | 3/8”M NPT | 2 | RK, RR, XM | Brass | Fixed |
 | AR20992 | 4000 | 5 | 1/2” F | 3/8” M | RK, RR, XM | Brass | ||
| AR21669 | 4000 | 5 | 1/2” M | 3/8”M NPT | RK, RR, XM | Brass | ||
 | AR20400 | 3650 | 5.5 | 1/2” F | 3/8” M | 2 | RK, RR, XM | Brass | Adjustable |
| AR20399 | 3650 | 5.5 | 1/2” M | 3/8” M | 1.8 | RK, RR, XM | Brass | Adjustable |
 | AR20082 | 3650 | 5.5 | 1/2” M | 3/8” M | 2 | RK, RR, XM | Brass | Fixed |
| AR20081 | 3650 | 5.5 | 1/2” M | 3/8” M | 1.8 | RK, RR, XM | Brass | Fixed |
 | AR20480 | 3650 | 5.5 | 1/2” M NPT | 3/8” M NPT | RK, RR, XM | Brass | ||
| AR20242G | 3650 | 5.5 | GHT & Filter | 3/8” M | RK, RR, XM | Brass | ||
 | AR24672 | 3600 | 5.5 | 3/8" F | 3/8" M | 2.2 | RR | Adjustable | |
 | AR24670 | 3600 | 5.5 | 3/8" F | 3/8" M | 2.2 | RR | Fixed | |
| AR24671 | 3600 | 4 | 3/8" F | 3/8" M | RR | Adjustable | ||
| AR24591 | 3600 | 4 | 3/8" F | 3/8" M | 2 | RR | Fixed | |
 | AR24669 | 3600 | 5.5 | 3/8" F | 3/8" M | RR | |||
 | AR21040 | 2600 | 42067 | 1/2" F | 3/8" M | 2.2 | RC, XM, XT | Brass | Adjustable |
| AR21039 | 2600 | 42038 | 1/2" F | 3/8" M | 2 | RC, XM, XT | Brass | Adjustable |
| AR20890 | 2600 | 42038 | 1/2" F | 3/8" M | 2 | RC, XM, XT | Aluminum | Adjustable |
 | AR21038 | 2600 | 42067 | 1/2" F | 3/8" M | 2.2 | RC, XM, XT | Brass | Fixed |
| AR21037 | 2600 | 42038 | 1/2" F | 3/8" M | 2 | RC, XM, XT | Brass | Fixed |
 | AR20888 | 2600 | 1/2" F | 3/8" M | 1.8 | RC, XM, XT | Aluminum | Fixed | |
 | AR21036 | 2600 | 42040 | 1/2" F | 3/8" M | RC, XM, XT | Brass | ||
 | AR23506 | 2600 | 4 | 3/8" F NPT | 3/8" M NPT | RC | Adjustable | ||
| AR23505 | 2600 | 4 | 3/8" F NPT | 3/8" M NPT | RC | Fixed | ||
| AR23504 | 2600 | 4 | 3/8" F NPT | 3/8" M NPT | RC | |||
| AR20242 | 3650 | 5.5 | 1/2” F | 3/8” M | RK, RR, XM | Brass | ||
| AR20821 | 2600 | 42040 | 1/2" F | 3/8" M | RC, XM, XT | Aluminum |
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