Soft Wash Pumps

How to Choose the Right Soft Wash Pump

Which pump belongs on your rig depends on how it's powered, how much flow you need, and whether the parts survive 12.5% sodium hypochlorite. Get one of those wrong and you'll either burn through pumps every few months or pay for power you don't use.

Power source: gas, 12V, or 24V

Gas pumps (Comet P40 and AR45) are what most full-time commercial guys run. They push 11+ GPM at up to 300 PSI and hold pressure all day on a Honda GX200. Change the oil and swap diaphragms when they wear, and you'll get years out of one. 12V pumps (Remco 5.3 and 7 GPM) run off your truck battery, weigh a fraction of a gas skid, and stay quiet enough for HOA work. The trade is flow: they top out around 7 GPM and 100 PSI. The Remco Zeus 24V splits the difference at 14 GPM and 150 PSI with no gas engine to maintain.

Flow rate (GPM)

GPM sets how fast you move chemical and how far you can reach from the ground. 5 GPM handles solo residential, single-story houses, fences, and small roofs. 7 GPM is the residential workhorse with enough flow for two-story work. 10+ GPM is what you want for commercial buildings, large HOAs, and three-story reach. If you're stuck between sizes or planning to take on bigger jobs this year, size up. A bigger pump running under light load stays cooler and lasts longer than a small one pushed to its limit.

Chemical resistance

Every pump here is built for SH, not adapted to it. The Comet P40 runs Desmopan diaphragms in a polypropylene body. The AR45 runs Viton diaphragms in a polypropylene-and-stainless-steel pump. Remco uses Viton and Santoprene wetted parts behind a sealed motor. All of it holds up to years of contact with 12.5% sodium hypochlorite. The brass-and-standard-seal pumps sold on Amazon and at general suppliers give out within a few months of SH exposure. That's why new contractors so often end up buying the same pump twice.

Pump, sprayer, or bundle

You can get most of these as a bare pump, a sprayer, or a full bundle. Go with the bare pump if you're swapping out a worn unit on a rig you've already built. The sprayer comes pre-mounted on a skid (gas only, Comet P40 and AR45) with the engine, gauges, and unloader already plumbed. The bundle is the whole setup: pump or sprayer, a size-matched proportioner, gun, hose, reel, plumbing kit, and a starter gallon of surfactant. It runs less than buying the same parts one at a time, and it saves you hours chasing fittings. Not sure which one fits your rig? Get on a call with us first. We'll match the pump to what you're washing and what you're driving.

Soft Wash Pump Comparison Chart

Related Categories

• Soft Wash Sprayers
• Comet Soft Wash Pumps
• Remco Pumps & Bundles
• Complete Soft Wash Bundles
• Soft Wash Proportioners

Frequently Asked Questions

What is the best soft wash pump?

Depends on the work. Full-time commercial guys on daily routes land on the Comet P40 (11 GPM, 300 PSI) or the AR45 (11.4 GPM, 290 PSI), and both last years with basic upkeep. Most residential pros run the Remco 12V 7 GPM because it handles two-story houses without the weight or noise of a gas skid. If you want close to gas output without the engine, the Remco Zeus 24V at 14 GPM is the one.

Should I run a gas or 12V soft wash pump?

Go gas (Comet P40, AR45) if you're full-time, working commercial, or you need 10+ GPM at distance. Go 12V (Remco 5.3 or 7 GPM) if you're starting out, working weekends, sticking to residential, or running HOAs that won't allow a gas engine. We break the whole thing down here: 12V vs Gas Soft Wash Pumps.

What GPM soft wash pump do I need?

Match it to the work. 5 GPM handles solo residential, single-story, fences, and small roofs. 7 GPM covers two-story residential. 10+ GPM (Comet P40, AR45, or Remco Zeus) is for commercial, large HOAs, and three-story reach from the ground.

What's the difference between Comet, AR, and Remco pumps?

Comet and AR (Annovi Reverberi) are gas diaphragm pumps on a Honda GX200. They push high flow at high pressure and last for years, which is why you'll find one or the other on most commercial rigs. The P40 uses Desmopan diaphragms and the AR45 uses Viton, and both run polypropylene pump bodies. Remco pumps are electric and run on 12V or 24V battery power. They're lighter, quieter, and cheaper up front, but they cap out at lower flow and pressure and won't last as long under heavy commercial use.

Are these pumps built for sodium hypochlorite?

Yes. Every pump on this page is built for soft wash chemicals. The Comet P40 uses Desmopan diaphragms, the AR45 uses Viton, and Remco uses Viton and Santoprene behind a sealed motor. All of them hold up to years of 12.5% SH. The bargain pumps from general suppliers use brass and standard seals that give out in months.

How long does a soft wash pump last, and can I rebuild it?

A gas pump like the Comet P40 or AR45 gives you years of daily commercial use with basic upkeep: oil changes on the engine and pump, an end-of-shift flush, and new diaphragms and seals when they wear out. We stock the AR45 Diaphragm Kit and AR45 Check Valve Kit right in this collection, so you can rebuild instead of replace. 12V diaphragm pumps usually run about 6 months of heavy use, and at that price most pros just swap in a new one. The Zeus 24V tends to outlast the 12V pumps because it runs cooler at the same workload.