Most pressure washing contractors stick to driveways and house washes. But there's a commercial niche with less competition, recurring contracts, and zero DIY threat: pool filter cleaning. Hotels, gyms, apartment complexes, and HOAs all need their pool filters serviced multiple times a year -- and most of them are looking for a reliable pro.

The Quick Answer

What pool filter cleaning pays in the real world:

Residential cartridge cleaning: $80 - $250 per visit
DE/sand filter service: $120 - $350 per visit
Commercial accounts (gyms, hotels, apartments): $300 - $800/month on maintenance contracts
Large commercial pool cleaning: $500 - $2,000 per clean depending on size
Labor rate: $60 - $150/hr (most cleans bill 1-3 hours)

Here's what makes this niche worth pursuing: 50 commercial accounts generates $7,000+ per month in recurring revenue. That's before upsells.

How Often Commercial Pools Need Filter Cleaning

Commercial pools see far more bather load than residential ones. That means filters clog faster -- usually 4-6 times per year vs 2 times for a residential pool.

Cartridge filters: every 3-6 months (quarterly for commercial)
DE (diatomaceous earth) filters: backwash monthly, full clean 2-3x per year
Sand filters: backwash weekly, deep clean 1-2x per year

Hotels and apartment pools run year-round. That means you're not stuck with a seasonal business -- these are 52-week accounts.

Who to Target

The best clients for pool filter cleaning have one thing in common: they can't afford pool downtime. A hotel with a dirty pool loses guests. A gym with a closed pool loses members.

Hotels and motels -- year-round pools, repeat visits guaranteed
Apartment complexes and HOAs -- management companies oversee multiple properties
Fitness centers and gyms -- high bather load, frequent cleaning needed
Schools and universities -- large pools, institutional budgets
Water parks -- massive filters, high-ticket work

One hotel property manager who oversees multiple properties can send you 10+ pools. Land one relationship and you have a full schedule.

The Right Technique (Low PSI, Not High)

Here's the part most pressure washers get wrong. Pool filter cleaning is not high-pressure work. You can damage or destroy filter media with too much force.

Cartridge Filters

Remove the cartridges and rinse with a garden hose or light pressure washer at under 1,500 PSI. Use a fan-tip nozzle, spray at 45 degrees between the pleats. For a deep clean, soak the cartridge in filter cleaning solution for 8-24 hours, then rinse. Reinstall and test.

DE Filters

Backwash first. Then disassemble the filter grid assembly, pressure rinse each grid, check for tears or cracks, and reassemble. Recharge with fresh DE powder at 1.2 lbs per 10 sq ft of filter area.

Wastewater

Pool filter rinse water contains DE, algaecides, and chlorine byproducts. Most municipalities require you to discharge to the sanitary sewer or use a reclamation system -- not a storm drain. Check local rules before you start. Non-compliance fines are real.

Equipment You Already Have

The good news: you probably already own most of what you need. A mid-range pressure washer (1,500-2,000 PSI max for filters) and basic hand tools will handle most filter cleaning work. Add a chemical soak tank ($50-150), filter cleaning solution ($20-40 per job), and wastewater reclamation bags for DE discharge.

Unlike grease traps or industrial cleaning, the startup cost here is minimal. You can add this service to your existing business in a weekend.

How to Price It

For commercial contracts, structure your pricing as a monthly maintenance fee. This smooths your cash flow and locks in the client. A typical commercial pool maintenance contract includes:

Quarterly filter deep cleans
Monthly cartridge inspection
Priority emergency response
Written service records (property managers need these for compliance)

A gym with two pools and quarterly filter cleans at $500 per clean is $4,000/year from one account. Sign 10 similar accounts and you've added $40,000 in annual revenue with no extra equipment.

Bottom Line

Pool filter cleaning is low competition, recurring work that pays well. Commercial clients are less price-sensitive than homeowners, and one good relationship with a property management company can fill your schedule. If you want to stop chasing one-off residential jobs and build something more stable, this niche is worth your time.

If you're quoting commercial pool service contracts, try QuoteSnap for free. It helps you build professional estimates fast and capture leads before competitors respond.

Pressure Washing Pool Filters: Commercial Pool Service Niche (2026)