Pentair 32 oz Cyanuric Acid Reagent R161616
Pentair
SKU: R161616
Pentair Rainbow Cyanuric Acid Testing Reagent, 32 oz | R161616
Pentair R161616 Cyanuric Acid Testing Reagent is a genuine Pentair replacement reagent designed for measuring cyanuric acid (CYA), also known as chlorine stabilizer or conditioner, in swimming pool and spa water. Supplied in a convenient 32-ounce bottle, this testing solution is ideal for pool service professionals, commercial facilities, and residential pool owners who regularly monitor water chemistry.
Cyanuric acid helps protect chlorine from degradation caused by the sun's ultraviolet (UV) rays. Proper testing of CYA levels is essential for maintaining effective chlorine sanitation and preventing excessive stabilizer buildup. Pentair R161616 allows users to monitor stabilizer concentrations using compatible Pentair Rainbow water testing equipment.
Key Features
- Genuine Pentair OEM Reagent: Manufactured for use with compatible Pentair Rainbow cyanuric acid testing procedures.
- Measures Cyanuric Acid: Helps determine chlorine stabilizer concentrations in pool and spa water.
- 32-Ounce Bottle: Convenient larger-volume container suitable for frequent water testing.
- Supports Proper Water Balance: Helps pool owners maintain appropriate stabilizer levels for effective chlorine protection.
- Professional and Residential Use: Suitable for pool service technicians, commercial maintenance teams, and homeowners.
- Easy Reagent Replacement: Replenishes the testing solution used in compatible water testing kits.
Product Specifications
- Manufacturer: Pentair
- Brand: Pentair Rainbow
- Manufacturer Part Number: R161616
- Pool360 Product Number: RAI-45-904
- Product Type: Cyanuric Acid Testing Reagent
- Container Size: 32 fl oz (1 Quart / 946 mL)
- Application: Swimming Pools and Spas
- Form: Liquid Reagent
- UPC: 788379004026
- Quantity: One 32 oz Bottle
Why Test Cyanuric Acid?
Cyanuric acid acts as a stabilizer that reduces chlorine loss caused by sunlight. While maintaining sufficient CYA helps extend chlorine effectiveness in outdoor pools, excessive concentrations can reduce chlorine's sanitizing efficiency.
Regular cyanuric acid testing is particularly important after adding pool stabilizer, draining or refilling pool water, or making significant adjustments to pool chemistry.
Usage Instructions
- Collect a pool or spa water sample according to the instructions supplied with your compatible testing kit.
- Add the specified amount of Pentair R161616 Cyanuric Acid Reagent.
- Mix the sample as directed by the testing kit manufacturer.
- Complete the cyanuric acid measurement procedure using the appropriate testing equipment.
- Compare the result with the recommended stabilizer concentration for your pool and sanitizer system.
Note: This product is a testing reagent and is not intended to be added directly to pool or spa water as a chemical treatment. Follow the instructions provided with your compatible Pentair testing kit.
Related Pool Water Testing Products
Explore additional water testing solutions available at Aqua Pool Supply:
- Taylor Cyanuric Acid Reagent, 32 oz | R-0013-F – Alternative CYA testing reagent for compatible Taylor test kits.
- Taylor Cyanuric Acid Reagent, 16 oz | R-0013-E – Smaller reagent bottle for compatible Taylor testing equipment.
- Replacement Pool & Spa Test Reagents – Browse additional water chemistry testing reagents.
- Pool & Spa Test Strips – Shop water testing strips for routine pool and spa maintenance.
Maintain Accurate Pool Water Chemistry
Whether you're managing a residential swimming pool or servicing multiple commercial facilities, the Pentair Rainbow R161616 Cyanuric Acid Testing Reagent provides a convenient replacement solution for regularly monitoring stabilizer levels and maintaining proper pool water chemistry.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 7:00 am to 5:00 pm Phoenix Time
Saturday: 8:00 am to 2:00 pm
Sunday: Closed
- We do not ship on Saturday or Sunday.
- Orders totaling more than $300 will require signature confirmation upon delivery.
- We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
- Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
- Expedited shipping options are available at checkout.
Return Policy:
- Products that are received damaged will receive a refund in store credit.
- Most products are eligible for return within 30 days of receipt, except where noted below.
- To initiate a return, please complete an RMA form prior to sending your item back.
- Original shipping costs are non-refundable and will be deducted from the return credit.
- Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
- Some returns will be charged an automatic 15% restocking fee.
- We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
- Please complete the return form to receive your RMA number and return shipping label.
- Chemical products are not eligible for return under any circumstances.
- The Pentair Colorsync 618031 is not eligible for return.
- Pool cleaners are not eligible for return.
- Opened seals and o-rings are not eligible for return.
- Capacitors are not eligible for return.
- Plastic popup tools are not eligible for return.
- Automation components and circuit boards are not eligible for return.
- If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
- Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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