Proportioners

Proportioners let soft washing contractors mix sodium hypochlorite, water, and surfactant on‑demand, so you hit your target strength at the nozzle without batch‑mixing. This category features proportioner manifolds and related parts sized for common soft wash pumps to help you set repeatable ratios, reduce chemical waste, and speed changeovers between jobs.

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Proportioners for Soft Washing: Buyers Guide

What is a Proportioner?

A soft wash proportioner is a metering manifold that draws from separate tanks of sodium hypochlorite (SH), water, and surfactant, then blends them just before the pump. Adjustable valves let you set and repeat mix strengths at the nozzle without premixing drums or draining tanks between jobs.

Who Benefits from a Proportioner?

  • Contractors who want consistent, repeatable mix ratios for roofs, siding, and building washes.
  • Teams looking to cut chemical waste and time spent batch‑mixing.
  • Crews running varied work (house wash in the morning, roof wash in the afternoon) who need fast changeovers.

How to Choose Your Proportioner

Match Your Pump and Flow

Select a manifold sized for your delivery pumps working flow so you dont starve the pump or create excess back pressure.

  • 12V diaphragm: commonly 37 GPM systems
  • Air diaphragm: often 512+ GPM
  • Booster/piston: verify system specifications

Choose Chemical‑Ready Materials

For SH service, look for PVDF/Kynar, Schedule 80 PVC, or polypropylene wetted parts with compatible seals (e.g., Viton or EPDM). Avoid brass and aluminum in the chemical path.

Pick Your Metering Valves

Needle valves provide fine ratio control at lower flows; ball valves switch quickly and are rugged for higher flow rates. Graduated dials make it easy to record repeatable settings for your crew.

Plan the Layout

Keep suction lines short and equal in diameter, add strainers on SH and surfactant lines, include a dedicated fresh‑water flush, and clearly label each pickup to prevent cross‑draw.

Common Mix Ranges and Applications

Application Typical SH at Nozzle Notes
House wash (vinyl, fiber‑cement, painted masonry) ~0.251% Begin at the low end; increase only as needed based on organic load.
Roof wash (asphalt shingle, tile) ~13% Work in sections; manage runoff and protect landscaping.
Wood fencing/deck prep ~0.250.75% Test a small area first; follow any required neutralization steps.
Plant/landscape rinse 0% Use water only via the proportioners flush line.

Always follow chemical labels and local regulations. Sodium hypochlorite is corrosiveuse compatible materials, wear appropriate PPE, prevent cross‑contamination, and flush your system with fresh water after use.

Installation and Maintenance Tips

  • Mount the manifold where valves are easy to see and label each pickup (Water, SH, Surfactant).
  • Add inline strainers on SH and surfactant lines to protect valves and orifices.
  • Use unions/quick‑disconnects to simplify service and seasonal rebuilds.
  • Balance hose lengths and IDs from each tank to improve metering accuracy.
  • Record dial positions that yield your target mixes for repeat jobs and crews.
  • Flush with fresh water until odor dissipates after each use and before storage.

Learn More

Need help sizing a proportioner for your rig?

Our team can recommend a proportioner, valves, and fittings that match your pump, target ratios, and budgetand help you plan a reliable flush setup.

Talk to an Equipment Specialist

Proportioners FAQ's

Rinse with fresh water after each use, keep strainers clean, inspect hoses and seals, and rebuild metering valves as recommended by the component manufacturer.
Not usually. A proportioner supplies mixed solution to your soft‑wash pump directly. Some rigs keep a downstream injector for high‑reach bleach application on separate pressure‑wash tasks.
Start with low SH valve settings and increase gradually while testing on a small area until organic growth clears predictably. Record the valve positions that produce your target result for repeat use.
Use chemical‑ready wetted parts such as PVDF/Kynar, Schedule 80 PVC, or polypropylene with compatible elastomers (e.g., Viton or EPDM). Avoid brass and aluminum in the SH path; stainless may require careful rinsing depending on conditions.
Yes. Choose a manifold sized for your pump’s working flow (GPM) and plumbing. Undersized manifolds can starve the pump; oversized components can be harder to meter accurately.
A proportioner meters SH, water, and surfactant from separate tanks and blends them on‑demand, so you set the nozzle strength with valves instead of premixing a tank. It speeds changeovers and reduces leftover chemical.
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