Bolt on Unloaders
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This unloader features a bolt on design with internal by-pass system. Adjustable pressure releases pressure in pump head when in by-pass, protecting from over pressurization. Eliminates by-pass hose and fittings and includes a fixed or adjustable built-in chemical injector. The molded plastic adjusting knob is designed for user comfort. Brass body with a stainless steel, plunger and spring, by-pass is aluminum or brass.
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Max |
Max |
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| Model |
PSI |
GPM |
Inlet |
Outlet |
By-Pass |
Injector |
Size |
| AR20821 |
2,600 |
2-5 |
1/2" F |
3/8" M |
Aluminum |
- |
- |
| AR20888 |
2,600 |
2-3 |
1/2" F |
3/8" M |
Aluminum |
Fixed |
1.8 |
| AR20890 |
2,600 |
2-3 |
1/2" F |
3/8" M |
Aluminum |
Adjustable |
2.0 |
| AR21036 |
2,600 |
2-5 |
1/2" F |
3/8" M |
Brass |
- |
- |
| AR21037 |
2,600 |
2-3 |
1/2" F |
3/8" M |
Brass |
Fixed |
2.0 |
| AR21038 |
2,600 |
3-4 |
1/2" F |
3/8" M |
Brass |
Fixed |
2.2 |
| AR21039 |
2,600 |
2-3 |
1/2" F |
3/8" M |
Brass |
Adjustable |
2.0 |
| AR21040 |
2,600 |
3-4 |
1/2" F |
3/8" M |
Brass |
Adjustable |
2.2 |
Breakdown (PDF 934kb)
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Max |
Max |
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| Model |
PSI |
GPM |
Inlet |
Outlet |
By-Pass |
Injector |
Size |
| AR20242 |
3,650 |
3-5.5 |
1/2" F |
3/8" M |
Brass |
- |
- |
| AR20242G |
3,650 |
3-5.5 |
GHT & Filter |
3/8" M |
Brass |
- |
- |
| AR20081 |
3,650 |
3-5.5 |
1/2" M |
3/8" M |
Brass |
Fixed |
1.8 |
| AR20082 |
3,650 |
3-5.5 |
1/2" M |
3/8" M |
Brass |
Fixed |
2.0 |
| AR20399 |
3,650 |
3-5.5 |
1/2" M |
3/8" M |
Brass |
Adjustable |
1.8 |
| AR20400 |
3,650 |
3-5.5 |
1/2" F |
3/8" M |
Brass |
Adjustable |
2.0 |
| AR20480 |
3,650 |
3-5.5 |
1/2" M NPT |
3/8" M NPT |
Brass |
- |
- |
Breakdown (PDF 842kb)
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Max |
Max |
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| Model |
PSI |
GPM |
Inlet |
Outlet |
By-Pass |
Injector |
Size |
| AR21669 |
4,000 |
5 |
1/2" M |
3/8" M NPT |
Brass |
- |
- |
| AR20992 |
4,000 |
5 |
1/2" F |
3/8" M |
Brass |
- |
- |
| AR22206 |
4,000 |
5 |
1/2" M |
3/8" M NPT |
Brass |
Fixed |
2.0 |
| AR22287 |
4,000 |
5 |
1/2" M |
3/8" M |
Brass |
Adjustable |
2.0 |
Breakdown (PDF 806kb)
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Max |
Max |
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| Model |
PSI |
GPM |
Inlet |
Outlet |
By-Pass |
Injector |
Size |
| AR20802 |
3,650 |
9 |
3/4" F |
3/8" M |
Brass |
- |
- |
| AR20758 |
3,650 |
9 |
1/2" F |
3/8" M |
Brass |
- |
- |
| AR20759 |
3,650 |
9 |
1/2" F |
3/8" M |
Brass |
Fixed |
2.0 |
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