Pentair Rainbow R172008W 3 in. threaded white chemical feeder capPentair Rainbow 3" Threaded White Cap, R172008W In stock$2599
Pentair Rainbow R172008W 3 in. threaded white chemical feeder cap
Shop all Pentair

Pentair Rainbow 3" Threaded White Cap, R172008W

Ask a questionMPN R172008W
$2599
In stock
Get volume pricing Request a quote

30 day returns · Easy, with prepaid labels provided

Quick overview

  • Genuine Pentair Rainbow The factory R172008W cap, not a generic lid.
  • Fits seven feeder models Listed for Rainbow 300, 302, 300-19, 300-29, 300-29X, 320 and 322 chemical feeders.
  • 3 in. threaded Threads onto the 3 in. opening at the top of the feeder body.
  • White Supplied in white, matching the original cap.
  • The part that cracks Feeder caps take the sun and the chemical vapor, and a crazed or split cap is a common leak source.
  • Cap only The lid o-ring is a separate part, and is worth replacing at the same time.
Full description and specifications ↓

Need a hand?

Bilingual support from pool professionals.
(888) 751-8084CallChat with a techChatEmail usEmail

Send us a message

A pool professional will get back to you, usually the same business day.

About Pentair Rainbow 3" Threaded White Cap, R172008W, SKU RAI-451-4012. We will include it with your message.

We use your details to answer this message and nothing else.

Frequently bought together

Current item Pentair Rainbow 3" Threaded White Cap, R172008W
Pentair

Rainbow 3" Threaded White Cap, R172008W

$2599
Pentair Rainbow 320 In-Line Chlorinator, R171096
Pentair

Rainbow 320 In-Line Chlorinator, R171096

$14699
Pentair Lid O-Ring, 3-3/4 in. ID (Viton), R172009
Pentair

Lid O-Ring, 3-3/4 in. ID (Viton), R172009

$999
Pentair Short Chlorinator Tube, 5/8" OD, R172091
Pentair

Short Chlorinator Tube, 5/8" OD, R172091

$1499
Pentair Rainbow 1/2-Inch Control Valve for Automatic Chlorine/Bromine Feeders, R172086Z
Pentair

Rainbow 1/2-Inch Control Valve for Automatic Chlorine/Bromine Feeders, R172086Z

$5299
Pentair 1/2" NPT x Tube 90 Degree Elbow with Nut, R172272
Pentair

1/2" NPT x Tube 90 Degree Elbow with Nut, R172272

$1499
Pentair Rainbow Screen for 320 and 322 Automatic Chlorinator, 210396Z
Pentair

Rainbow Screen for 320 and 322 Automatic Chlorinator, 210396Z

$799
Subtotal

Similar products

Other products people compare with this one.

Pentair R172052 cap wrench for Rainbow chlorinator feeders Pentair Rainbow Chlorinator Cap Wrench, R172052$3599 Pentair Rainbow R270531 1 inch threaded union for HC series chemical feeders Pentair Rainbow 1" Threaded Union, HC Series, R270531$2799 Pentair R172248Z 1/2 in. check valve for the Rainbow Model 320 automatic feeder Pentair 1/2" Check Valve, Rainbow Automatic Feeder 320, R172248Z$1499 Pentair R171097 Rainbow chlorinator tube support spring Pentair Rainbow Tube Support Spring, R171097$1399 Pentair R172385D complete lid assembly for Rainbow HC series chlorinator Pentair Rainbow HC Series Chlorinator Lid Assembly, R172385D$3799 Pentair R172317 Rainbow chlorinator diverter tee with 1-1/2 inch NPT branch Pentair Rainbow Slip x Slip x 1-1/2" NPT Diverter Tee, R172317$3199 Pentair R175251 1 inch suction screen for Rainbow HC series chlorinators Pentair Rainbow 1" Suction Screen, R175251$1499 Pentair R175009 half inch drain valve for Rainbow chlorinators Pentair 1/2" Drain Valve for Rainbow Chlorinators, R175009$2399 Pentair Rainbow R172323 quarter inch tube by tube check valve with compression nuts Pentair Rainbow 1/4" Tube x Tube Check Valve with Compression Nuts, R172323$2599 Pentair Rainbow R172037 chlorine chamber for 300 and 320 series chlorinators Pentair Rainbow Chlorine Chamber for 300 and 320 Series Chlorinators, R172037$2699
Pentair R172240 Rainbow feeder lid o-ring Pentair Rainbow Lid O-Ring, R172240$2499 Pentair Rainbow R172060Z chemical feeder control valve with compression nut Pentair Chlorine Valve .25 in. Tube Control Valve with Compression Nut, R172060Z$3199 Pentair R172023Z 3/8 in. by 8 ft. poly chlorinator tubing for Rainbow feeders Pentair 3/8" x 8' Poly Chlorinator Tubing, R172023Z$1399 Pentair R172269 chlorinator feeder tube, 1/2 inch ID by 12 ft Pentair 1/2" I.D. x 12' Chlorinator Tube, R172269$3199 Pentair R172022 old style chlorine control valve for Model 300 automatic chemical feeders Pentair R172022 Old Style Chlorine Control Valve$3299 Pentair R270484 one inch close nipple for Rainbow automatic feeders Pentair 1" Close Nipple, R270484$1499 Pentair Rainbow R172324 spring style 1/2 inch tube by tube check valve Pentair Rainbow 1/2" Tube x Tube Check Valve, Spring Style, R172324$3899 Pentair Rainbow R172224X black drain and vent valve Pentair Rainbow Drain Vent Valve, Black, R172224X$1099 Pentair Rainbow R172034 saddle clamp for the Model 300 chlorinator Pentair Rainbow Saddle Clamp for Model 300 Chlorinator, R172034$1099 Pentair Rainbow R172374 chlorinator lock spring Pentair Rainbow Feeder Lock Spring, R172374$970

Product details

The Pentair R172008W is the 3 in. threaded white cap for Rainbow chemical feeders. It is listed for the Rainbow 300, 302, 300-19, 300-29, 300-29X, 320 and 322 feeders.

Why caps get replaced

The cap sits in full sun on top of a body full of chemical vapor, which is a hard life for plastic. Over a few seasons the material crazes, the threads wear, and the cap stops pulling down evenly. At that point the feeder leaks or loses pressure and the cap is the part at fault.

What is included

The cap only. The lid o-ring is sold separately, and since it is the other half of the seal, most people change both at once.

Specifications
Brand Pentair
Manufacturer part number R172008W
UPC 788379004491
Series Rainbow
Type Threaded chemical feeder cap
Size 3 in. threaded
Color White
Fits Rainbow 300, 302, 300-19, 300-29, 300-29X, 320 and 322 chemical feeders
Shipping weight 0.4 lb
Ships Parcel

Request a quote

Need a volume price, a freight quote, or pricing in writing before you order? We reply the same business day.

Request a quote

From Pentair

Your trusted source for all things pool. Pentair

Pentair equipment

Pentair SuperFlo VS 1.5 HP Variable Speed Pool Pump, 2.2 THP, EC-342001 Pentair MasterTemp 400 Natural Gas Pool Heater, EC-462028 Pentair Clean & Clear Plus 420 sq ft Cartridge Pool Filter, EC-160301 Pentair IntelliConnect Control & Monitoring System with Wi-Fi, EC-523317
Shop Pentair equipment

Genuine Pentair parts

Pentair Genuine OEM Seal Kit for WhisperFlo and IntelliFlo Pool Pumps, 356198 Pentair Genuine OEM High Flow Manual Air Relief Valve, 98209800 Pentair Genuine OEM FNS Plus Element Assembly Complete, 48 Sq Ft, 59023400 Pentair Genuine OEM MasterTemp/Max-E-Therm 6-Button Control Board Kit, 461105Z
Shop Pentair parts
Pool lighting: a backyard pool and spa lit in blue and green at nightPool water treatment: three people floating on rings in clear blue water, seen from abovePool cleaners: a toddler in flower sunglasses laughing in a yellow ring, held by her mother
Pentair makes pumps, filters, heaters, salt chlorinators, cleaners, lighting and automation for pools and spas.Shop all Pentair

Customer reviews

More from Pentair

Pentair SuperFlo VS EC-342001 1.5 HP variable speed pool pump, front view Pentair SuperFlo VS 1.5 HP Variable Speed Pool Pump, 2.2 THP, EC-342001$1,48900 Pentair SuperFlo EC-348190 single speed pool pump, 1 HP, 115/230V Pentair SuperFlo 1 HP Single Speed Pool Pump, 1.1 THP, 115/208-230V, EC-3481905.0 (1) $74800 Pentair WhisperFlo VS EC-011533 2.6 THP variable speed pool pump, top view Pentair WhisperFlo VS / VST 2.6 THP Variable Speed Pool Pump, 115/208-230V, EC-011533$1,79900 Pentair 262506 HiFlow 1.5 in. six way clamp style multiport valve Pentair Genuine OEM HiFlow Valve 1.5 in. 6-Way Clamp Style, 262506$20399 Pentair EC-520556 IntelliChlor 110/220V power center Pentair 110/220V IntelliChlor Salt Chlorine Generator Power Center, EC-520556$79900 Web Price Pentair 523769 IntelliChlor Plus and LT replacement sensor board Pentair IntelliChlor Plus and LT Replacement Sensor Board, 523769$39399 Pentair 350305S 3.2 kW 10 pole variable speed motor for IntelliFloXF and IntelliFlo 2 VST pumps Pentair 3.2 kW IntelliFloXF VSF, VSF, VS+SVRS, i1, i2 Motor, 350305S$78199 Pentair 523735-EC IntelliChlor Plus40 salt chlorine generator cell Pentair IntelliChlor Plus40 Salt Chlorine Generator Replacement Cell, 40,000 Gallons, 523735-EC$1,81900 Web Price Pentair Rainbow 320 in-line chlorinator R171096, front view Pentair Rainbow 320 In-Line Chlorinator, R171096$14699 Pentair 190003 tank clamp kit with tension control for Clean and Clear Plus, FNS Plus and Quad DE filters Pentair Genuine OEM Clamp Kit with Tension Control, 190003$30199
Pentair IntelliChlor LT25 salt chlorine generator cell 523747-EC Pentair IntelliChlor LT25 Salt Chlorine Generator Cell, 25,000 Gallons, 523747-EC$1,14900 Pentair IntelliFlo VS+SVRS variable speed pool pump, EC-011057 Pentair IntelliFlo VS+SVRS Variable Speed Pool Pump, 3 HP Max, 3.95 THP, 230V, EC-011057$2,39900 Pentair 170145 cartridge pack for Sta-Rite System 3 S7M120, inner and outer cartridges Sta-Rite 170145 System 3 S7M120 Large and Small Cartridge Set, 25021-0200S and 25022-0201S$48299 Pentair 261055 SM-20-3 2 in. side mount multiport valve kit, front view Pentair 2 in. Multiport Valve Kit for Side Mount Sand Filters, SM-20-3, 261055$29999 Pentair 523770 IntelliChlor Plus replacement controller (HMI), black Pentair IntelliChlor Plus Controller Replacement (HMI), Black, 5237705.0 (1) $38399 Pentair 261152 SM20-2 2 in. side mount multiport valve kit for DE filters Pentair 2" Valve Kit Multiport, Side Mount DE Filters SM20-2, 261152$29799 Pentair 357149 WhisperFlo and IntelliFlo volute housing replacement kit, front view Pentair WhisperFlo and IntelliFlo Volute Housing Replacement Kit, 357149$28799 Pentair MicroBrite Color LED pool light EC-620425, 12 volt, 14 watt, with 100 ft cord Pentair MicroBrite Color LED Pool Light 12 Volt, 14 Watt with 100' Cord, EC-620425$61900 Pentair 59023400 FNS Plus 48 sq ft complete DE grid assembly Pentair Genuine OEM FNS Plus Element Assembly Complete, 48 Sq Ft, 59023400$40199 Pentair Amerlite EC-602128 500W 120V inground pool light with stainless steel facering Pentair Amerlite Pool Light for Inground Pools with Stainless Steel Facering, 500W 120V 50' Cord, EC-602128$43900 Web Price

Questions and answers

What people ask about this product, answered by our pool techs.

Which feeders does this cap fit?
Rainbow chemical feeder models 300, 302, 300-19, 300-29, 300-29X, 320 and 322.
Does the o-ring come with it?
No. This listing is the cap alone. The lid o-ring is a separate Pentair Rainbow part and is the usual companion purchase.
Why is it branded Pentair when the feeder says Rainbow?
Rainbow is a Pentair line. The cap is the genuine Pentair part for those Rainbow feeders.
My cap will not seal any more. Is the cap the problem?
Often it is the o-ring rather than the cap, so check both. If the cap itself is crazed, cracked or the threads are damaged, replace it.
Ask your own question