Pentair® Replacement Aftermarket 1/2″ 0.5 inch Control Valve For Rainbow 300 320 Chlorinator & Soft Washing Proportioner Metering Control Valve R172086 Made by AquaStar
DO NOT OVER-TIGHTEN THE VALVE, IT WILL CRACK.
The Pentair® R172086 is a 1/2-inch control valve replacement for the Pentair® Rainbow automatic chlorine/bromine pool and spa inline feeder models 320, 322, and others. It is also known as a metering valve for soft washing proportioner.
A metering valve in the context of soft washing refers to a device used to regulate and control the flow of cleaning chemicals or detergents in a soft washing system. Soft washing is a low-pressure method used to clean surfaces, particularly exterior surfaces like roofs, siding, and other delicate surfaces, using specialized cleaning solutions and lower water pressure to prevent damage.
The metering valve allows the operator to accurately measure and adjust the amount of cleaning chemical or detergent being mixed with water, ensuring the proper dilution and concentration for effective cleaning without causing harm to the surface being cleaned. It helps maintain consistency and control in the application of the cleaning solution, optimizing the cleaning process.
The valve typically has settings or controls that allow the user to adjust the ratio of cleaning chemical to water, enabling them to tailor the mixture to suit the specific cleaning needs for different surfaces and types of dirt or grime. This level of control is essential for achieving efficient and safe soft washing results.
For Models 320, 322.
Made by AquaStar
Please be advised that certain manufacturers - including Pentair® (with their TradeGrade® products), Jandy®/Fluidra® (with their Trade Series Exclusive™ products), and Hayward® (with their Expert Line® products) - do not honor manufacturer warranties on specific product lines purchased online.
These policies are intentionally enforced by the manufacturers to prevent customers from purchasing the same products at lower prices online.
Warranty coverage for these products is generally only available when purchased in person from an authorized local dealer.
While we strive to take care of our customers by offering the lowest possible prices on brand new, genuine products, we do not provide warranty coverage ourselves, nor can we guarantee that the manufacturer will honor the warranty on products purchased from our online store.
It is the buyer’s responsibility to confirm warranty eligibility directly with the manufacturer before making a purchase.
If you are a local customer, you may be able to purchase these items in-store and obtain manufacturer warranty coverage. However, for many of our customers across the country, paying significantly more locally just to access a manufacturer warranty often doesn’t make financial sense, especially when some local suppliers charge considerably higher prices.
By completing your purchase, you acknowledge and agree that we are not responsible for warranty support or claims denied by the manufacturer due to their online sales restrictions.

Jeremy N. –
Delivered in time
Jeremy N. –
Delivered in time
Ella Jenkins –
Fast delivery and excellent customer care.