Pentair R161185 Solution #3 Acid Demand T/A 1 oz test reagent bottlePentair Solution #3 Acid Demand T/A 1 oz Bottle, R161185 In stock$599
Pentair R161185 Solution #3 Acid Demand T/A 1 oz test reagent bottle
Shop all Pentair

Pentair Solution #3 Acid Demand T/A 1 oz Bottle, R161185

Ask a questionMPN R161185
$599
In stock
Get volume pricing Request a quote

30 day returns · Easy, with prepaid labels provided

Quick overview

  • Genuine Pentair reagent Factory part R161185, matched to the test it is used in.
  • Solution #3 The acid demand and total alkalinity titrant, not a substitute for the pH or chlorine reagents.
  • 1 oz bottle The standard replacement bottle size.
  • Titration reagent Added drop by drop until the sample changes color, and the drop count gives the result.
  • Reagents age Old solution reads badly, which is why refilling matters more than most owners expect.
  • Refill, not a whole kit This is the bottle on its own, for a kit you already own.
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 Solution #3 Acid Demand T/A 1 oz Bottle, R161185, SKU RAI-45-948. We will include it with your message.

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

Frequently bought together

Current item Pentair Solution #3 Acid Demand T/A 1 oz Bottle, R161185
Pentair

Solution #3 Acid Demand T/A 1 oz Bottle, R161185

$599
Pool Season 3 in. Jumbo Chlorinating Tablets, 47251270
Pool Season

3 in. Jumbo Chlorinating Tablets, 47251270

$5900
AquaChek Silver 7-Way Pool and Spa Test Strips for pH, Total Chlorine, Free Chlorine, Bromine, Alkalinity, Total Hardness and Cyanuric Acid, 100 Strip Bottle
AquaChek

Silver 7-Way Pool and Spa Test Strips for pH, Total Chlorine, Free Chlorine, Bromine, Alkalinity, Total Hardness and Cyanuric Acid, 100 Strip Bottle

$3499
AquaChek 4-in-1 Free Chlorine Test Strips for Swimming Pools, 511242A
AquaChek

4-in-1 Free Chlorine Test Strips for Swimming Pools, 511242A

$999
Pool Season Polyquat 60 Concentrate Algaecide for Inground and Above Ground Pools, 32 oz, 47245960
Pool Season

Polyquat 60 Concentrate Algaecide for Inground and Above Ground Pools, 32 oz, 47245960

$3400
LaMotte Mobile WaterLink Spin Touch Lab, 3581
LaMotte

Mobile WaterLink Spin Touch Lab, 3581

$1,14900
LaMotte R-2086 ColorQ 2x PRO 7 Test Reagent Refill Kit
LaMotte

R-2086 ColorQ 2x PRO 7 Test Reagent Refill Kit

$10999
Subtotal

Similar products

Other products people compare with this one.

Pentair R161025 OTO Solution 1 chlorine and bromine test reagent, 1 oz bottle Pentair Solution OTO 1 Chlorine/Bromine 1 oz Bottle, R161025$699 Pentair R161178 number 2 pH test solution, 1 oz bottle Pentair 1 oz #2 pH Test Solution, R161178$599 Pentair R161004 OTO #2 test solution bottle for chlorine and bromine testing Pentair OTO #2 Test Solution$699 Taylor R-0005-A acid demand reagent in a .75 oz dropper bottle Taylor Acid Demand Reagent .75 oz. Dropper Bottle, R-0005-A$999 King Technology 01-14-3350 Frog @ease test strips King Technology Frog @ease Test Strips, 01-14-3350$1095 Taylor R-0008-A total alkalinity indicator reagent, .75 oz dropper bottle Taylor Total Alkalinity Reagent Indicator, .75 oz, R-0008-A$1099 Taylor R-0007-A Thiosulfate N/10 reagent, .75 oz dropper bottle Taylor Thiosulfate N/10, .75 oz Dropper Bottle, R-0007-A$1099 Taylor R-0009-A sulfuric acid .12N total alkalinity reagent in a .75 oz dropper bottle Taylor Sulfuric Acid .12N, .75 oz Dropper Bottle, R-0009-A$1099 Taylor R-0014-A phenol red pH indicator solution, .75 ounce dropper bottle Taylor pH Indicator Solution (for Residential Series), Phenol Red, .75 oz, Dropper Bottle, R-0014-A$1099 Taylor 9191 CYA display bottle with 7 mL and 14 mL graduations Taylor CYA Display Bottle, 7 and 14 mL, 9191$1099
Taylor R-0013-A cyanuric acid reagent, 3/4 oz. bottle Taylor Cyanuric Acid Reagent, 3/4 oz., R-0013-A$1199 LaMotte 106 test tube with cap, 5-10 mL LaMotte Test Tube and Cap, 5-10 mL$1199 King Technology Frog 5-way test strips, 50 count bottle King Technology Frog Test Strips (50 Count), 01-14-3318$1295 Taylor R-0004-A phenol red #4 pH indicator solution, .75 oz dropper bottle Taylor Phenol Red #4 pH Indicator Solution, .75 oz, R-0004-A$1299 Taylor R-0003-A DPD Reagent #3, .75 oz bottle Taylor DPD Reagent #3, .75 oz. (22 mL), R-0003-A$1299 LaMotte 2998 Insta-TEST sodium chloride salt test strips, bottle of 10 LaMotte Insta-TEST Sodium Chloride (Salt) Test Strips, 2998$1299 Taylor R-0002-A DPD reagent #2 in a .75 oz dropper bottle Taylor DPD Reagent #2, .75 oz., R-0002-A$1399 Taylor R-0010-A calcium buffer reagent in a .75 oz dropper bottle Taylor Calcium Buffer .75 oz Dropper Bottle, R-0010-A$1399 LaMotte P-6741-G DPD 1B free chlorine reagent, 30 mL bottle LaMotte DPD 1B Free Chlorine, 30 mL, P-6741-G$1399 AquaChek 562227 phosphate test kit bottle AquaChek Phosphate Test Kit, 562227$1499

From Pentair

Your trusted source for all things pool. Pentair

Pentair equipment

Pentair SuperFlo VS 1.5 HP Variable Speed Pool Pump, 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

Product details

Pentair R161185 is the Solution #3 Acid Demand T/A reagent, supplied in a 1 oz bottle. It is the replacement bottle for a test kit you already own.

What it does

Solution #3 is a titrant. You add it to the water sample a drop at a time until the color changes, and the number of drops it took is the reading. That makes the accuracy of the result entirely dependent on the condition of the solution, which is why reagents are treated as a consumable rather than a permanent part of the kit.

Use the right number

Each numbered solution in a test kit does one job, and they are not interchangeable. This is Solution #3, the acid demand and total alkalinity reagent. If your kit is giving results that do not match a pool you know is balanced, tired reagents are the usual cause.

Specifications
Brand Pentair
Manufacturer part number R161185
UPC 788379003401
Type Test kit reagent
Solution Solution #3 Acid Demand T/A
Volume 1 oz
Shipping weight 0.1 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

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, EC-342001$1,48900 Pentair SuperFlo EC-348190 single speed pool pump, 1 HP, 115/230V Pentair SuperFlo 1 HP Single Speed Pool Pump, 115/230V, EC-348190$74800 Pentair WhisperFlo VS EC-011533 2.6 THP variable speed pool pump, top view Pentair WhisperFlo VS 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$39299 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$14499 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, 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$46499 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, 523770$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$39399 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.

What test is this solution used for?
It is the acid demand and total alkalinity titrant, listed by the manufacturer as Solution #3 Acid Demand T/A.
How big is the bottle?
1 oz, the standard replacement size.
Can I use it in place of another reagent?
No. Each numbered solution does one job. Solution #3 will not stand in for the pH or chlorine reagents.
How often should reagents be replaced?
Test solutions lose accuracy as they age, so replacing them each season is normal practice. A kit reading oddly on a pool you know is balanced usually has tired reagents.
Ask your own question