General Pump Water Filter Parts

The clear bowl on a General Pump water filter exists so you can watch trouble arrive before it reaches your pump. When the screen loads up or the bowl starts weeping, this page has the exact General Pump water filter parts to fix it: stainless replacement screens in 50 and 80 mesh, polycarbonate bowls, and the O-rings that seal them. Have the filter body size handy and call 301-519-9274, and Sun Brite Supply in Gaithersburg will pull the right part number for you.

How General Pump DF Filter Parts Fit Together

General Pump's DF series clear bowl filters come in five port sizes, 1/2, 3/4, 1, 1-1/4, and 1-1/2 inch NPT, and every serviceable piece inside is replaceable. Three parts do all the work. The stainless mesh screen catches sediment. The polycarbonate bowl holds it where you can see it. The EPDM O-ring seals the bowl to the nylon body. When any one of them fails, you replace that part, not the whole filter assembly.

Screens and bowls are grouped by body size. The 1/2 and 3/4 inch filters share one screen family and one bowl, and the 1 inch through 1-1/2 inch filters share another. That is why the part descriptions list multiple sizes. Match your filter's port size to the part and you cannot order wrong.

50 Mesh or 80 Mesh

Mesh count is holes per inch, so a higher number means a finer screen. The standard 50 mesh screen stops particles down to about 300 microns, which handles city water and most tank setups. The optional 80 mesh screen tightens that to under 200 microns for wells, ponds, and reclaim systems that carry finer silt. The trade is flow. A finer screen clogs sooner, and a starved inlet cavitates the pump, which does far more damage than the grit ever would. Run 50 mesh unless your water has proven it needs 80, and clean whichever one you run on a schedule.

Know the Limits

These are inlet-side filters, not high pressure parts. The 1/2 and 3/4 inch bodies are rated 150 PSI at 70 degrees, and the larger bodies 100 PSI at 125 degrees. Keep them on the supply side of the pump, out of direct sun where polycarbonate slowly clouds, and away from strong solvents that craze the bowl. Snug the bowl hand tight against a healthy O-ring. Reefing on a dry or flattened O-ring is how bowls crack.

Replacement Part Lookup

Prices shift with the vendor list. Call to confirm before you build an order around one number.

From the Field

Two dollar O-rings solve most of the filter complaints that reach this counter. A bowl that drips air into the suction line makes a pump rattle and surge in ways that send people shopping for unloaders and repair kits, when the real fix seals for pocket change. The other pattern worth stealing from high-hour crews is the spare screen rotation. They keep a clean screen in the truck, swap it at the jobsite in thirty seconds, and soak the dirty one back at the shop. The machine never waits on a scrubbing, and the screens last years instead of getting stabbed clean with a pick on a tailgate.

Related Collections

• Water Filters
• Inline Filters
• Strainers
• Chemical Strainers
• Hypro Filters
• Hypro Filter Parts
• Green Cap Water Filters
• General Pumps
• General Pump Parts
• Or pick parts up at our Gaithersburg pressure washer store

Frequently Asked Questions

Should I use a 50 mesh or 80 mesh screen?

Run 50 mesh on city water and clean tank supplies. Move to 80 mesh only when your source carries fine silt, like wells, ponds, or reclaim water. The finer screen protects better but clogs faster, and a clogged inlet screen starves the pump.

How do I know which General Pump screen fits my filter?

Go by the port size of the filter body. The 1/2 and 3/4 inch filters share screens, and 1 inch, 1-1/4 inch, and 1-1/2 inch bodies each have their own. The GP part number is printed in our table above, so you can match it to the number in your filter manual.

Why does my clear bowl filter leak or suck air?

The bowl O-ring has flattened, dried out, or picked up grit. Replace it rather than cranking the bowl tighter, since overtightening against a bad O-ring is the main way bowls crack. Keep a spare O-ring taped inside the machine cover.

How often should the screen come out for cleaning?

Look at the bowl every time you hook up, and pull the screen the moment you see buildup. On clean city water that may be monthly. On tank or well water, check weekly. The clear bowl makes the inspection a five second glance, so use it.

Can these filters handle hot water?

Only mildly warm water. The small bodies are rated 150 PSI at 70 degrees and the large ones 100 PSI at 125 degrees. Mount them on the cool supply side, never downstream of a burner or on the pressure side of the pump.

What makes a polycarbonate bowl cloud up or crack?

Sunlight, strong solvents, and overtightening. UV slowly hazes polycarbonate, some chemicals craze it, and forcing a dry O-ring splits it. If your bowl has gone milky enough to hide the screen, replace it, because a bowl you cannot see through defeats the purpose.