By Rainbow Products



Model # R171026

Alternate Part #'s PENR171026, RAI-45-912

Product Description

The Pentair Rainbow 300 is a completely enclosed off line system ideal for existing pools where permanent installation into the return line is impractical. It top loads, requires no venting and lets you adjust the optimum chlorine/bromine feed rate for your pool. It operates on pressure side of pump. Spa chamber included


  • Available in clear amber for easy tablet level monitoring
  • Completely enclosed system- no sperical venting required
  • No escaping gas
  • 50 PSI maximum operating pressure
  • Retrofits into existing pools/spas
  • Uses 1/4 in. feeder hoses, control valves, and fittings.


  • Holds 11 large or 98 small tablets
  • Treats 12,000 to 48,000 gallons
  • Dimensions: 21 in. (H) x 7 in. (W) x 12 in. (D)
  • Service Clearance for Lid Removal: 22-1/4 in.


1 Year Warranty

* Note: Consult your local authority to determine their guidelines if needed. Results may vary due to pool/spa equipment and many other factors.


?     Asked on 3/10/2007by Guest

Is there a feedback mechanism that tells the unit the chlorine balance in the pool? Is this a way for me to automate addition of clorine to keep it always at the correct level? Or, just another place to put the tab aside from the the drain basket?

A  Answered on 3/10/2007 by InyoPools Product Specialist Patrick P.

There is a dial on this unit which has a setting from 1-10 If you set the dial on 1 it will be letting the least amount of chlorine to the pool and if you have it set at 10 this would send the most amount of chlorine to the pool. So you can automate the feed of chlorine to the pool but you will still need to manually test your water. We do not recommend placing tablets in the skimmer basket because this high concentration of chlorine goes directly back to your pump and can cause corrosion to your pool equipment. If you do not go with the automatic chlorinator we would recommend at least going with one of our floating chlorinators so you do not damage your equipment you may view our floating chlorinators here