The XWP series is the volume end of AR’s industrial range: 13 to 18.5 GPM at 1,740 to 2,200 PSI, running at 1,450 RPM on a 24 mm solid shaft.

That combination is deliberate. These are not built to cut, they are built to move water across surface, continuously, for years.

The XWP Series family

Look at the EBHP column. Every model in the range needs roughly the same power, between 20 and 22 HP. The series is designed that way: one motor size, and you choose where on the flow-versus-pressure curve you want to sit.

The HN suffix on the XWP70.12HN is a nickel-plated head, for hard water, detergent and anywhere plain brass will pit.

Choosing along the curve

• 13.2 GPM at 2,200 PSI: the most pressure in the range. Right when there is baked-on soil and you still need volume.
• 15.9 GPM at 1,900 PSI: the middle. A good general washdown choice.
• 18.5 GPM at 1,740 PSI: maximum coverage. Right for sanitation rinse, multiple stations and large surface cleaners, where 1,740 PSI is more than enough and the volume is the point.

If you are rinsing rather than removing, go to the higher flow. If you are removing, go to the higher pressure, or look at a different family.

What the supply has to look like

This is the constraint that catches people. An 18.5 GPM pump needs 18.5 GPM delivered continuously at positive inlet pressure. That means a tank above the pump and a properly sized feed line, not a hose, not a long run of 3/4 in pipe, and not a restrictive gate valve.

Starve an XWP and it cavitates. The noise is unmistakable and the damage is not reversible.

How XWP pumps are built

• Brass head, stainless valves, ceramic plungers
• Oversized bearings and heavy-duty crankcase
• 31.8 oz oil capacity, doing most of the cooling at this load
• 24 mm solid shaft, for belt drive or direct motor coupling
• 1,450 RPM, which is why these last

Where XWP pumps are used

• Municipal: storm drain cleaning, street and infrastructure washdown
• Agriculture: irrigation line flushing, greenhouse sanitation, livestock facilities
• Food processing: high-flow equipment and workspace sanitation
• Fleet and heavy equipment: truck, bus and construction vehicle wash stations
• Mining and industrial: equipment washdown and dust suppression
• Marine: hull cleaning, pier maintenance, high-volume wash systems
• Energy and utilities: cooling tower cleaning, industrial scale flushing

The common thread is a lot of surface and a lot of water, on a schedule.

Servicing XWP pumps

Fully rebuildable, with valve kits, piston kits, water seals, oil seals and hot water seal sets available, plus rail kits in 1-1/4 in, 2-1/2 in and U-bracket for mounting. Confirm part numbers against your exact model, because the HN variant differs.

On a pump running eight hours a day, the maintenance schedule is the whole difference. Oil on interval, seals replaced before they fail, inlet filtered and the filter cleaned. Done properly these run for thousands of hours; done poorly they are an annual rebuild.

Browse the XWP series, or send your flow requirement and water source and you will get a model your supply can actually feed.