The 5 tankless heaters we'd put in for the morning rushTop 5 tankless heaters → See the ranking
Compare models

69 products rated

Service kits, valves & parts compared (2026)

Flushing kits, descalers, service valve kits, vent kits, expansion tanks, condensate neutralizers and recirculation pumps, rated from their documented listings. Fit is model-specific: check your exact heater and its manual.

Rating

69 products

7.6/10
PROCURU 18" Flexible Gas Connector Kit
PROCURU 18" Flexible Gas Connector Kit$28.89 on Sep 30, 2026, may have changedSpec-based rating
7.5/10
Eastman 3/4" Expansion Tank Tee
Eastman 3/4" Expansion Tank Tee$39.98 on Sep 30, 2026, may have changedSpec-based rating
7.5/10
Eastman 60022 Expansion Tank, 2 gal
Eastman 60022 Expansion Tank, 2 gal$34.98 on Sep 30, 2026, may have changedSpec-based rating
7.4/10
BHVALCON 3/4" Valve Kit with Gas Lines
BHVALCON 3/4" Valve Kit with Gas Lines$94.99 on Sep 30, 2026, may have changedSpec-based rating
7.4/10
Chromex Flush Kit, Concentrated Vinegar
Chromex Flush Kit, Concentrated Vinegar$144.99 on Sep 30, 2026, may have changedSpec-based rating
7.4/10
PROZRTED HBS24-12T Recirculating Pump
PROZRTED HBS24-12T Recirculating Pump$129.99 on Sep 30, 2026, may have changedSpec-based rating
7.3/10
PEVEPEXE Expansion Tank, 2.1 gal
PEVEPEXE Expansion Tank, 2.1 gal$37.99 on Sep 30, 2026, may have changedSpec-based rating
7.3/10
Alloxity 48" Flex Gas Line Kit
Alloxity 48" Flex Gas Line Kit$24.99 on Sep 30, 2026, may have changedSpec-based rating
7.3/10
Alloxity 60" Flex Gas Line Kit
Alloxity 60" Flex Gas Line Kit$26.99 on Sep 30, 2026, may have changedSpec-based rating
7.3/10
American Valve CondensateRx Neutralizer
American Valve CondensateRx Neutralizer$60.61 on Sep 30, 2026, may have changedSpec-based rating
7.3/10
PROZRTED HBS24-12E Recirculating Pump
PROZRTED HBS24-12E Recirculating Pump$159.99 on Sep 30, 2026, may have changedSpec-based rating
7.3/10
Rheem RTG20280-1 Vent Termination Kit
Rheem RTG20280-1 Vent Termination Kit$119 on Sep 30, 2026, may have changedSpec-based rating
7.3/10
Superior Pump 91660 Descaler Pump Kit
Superior Pump 91660 Descaler Pump Kit$129.99 on Sep 30, 2026, may have changedSpec-based rating
7.3/10
MGGPAXXT 3/4" IPS Service Valve Kit
MGGPAXXT 3/4" IPS Service Valve Kit$44.99 on Sep 30, 2026, may have changedSpec-based rating
7.2/10
Iococee 3/4" IPS Isolation Valve Kit
Iococee 3/4" IPS Isolation Valve Kit$49.99 on Sep 30, 2026, may have changedSpec-based rating
7.2/10
AIDPATH 10.1 GPM Circulation Pump
AIDPATH 10.1 GPM Circulation Pump$89.89 on Sep 30, 2026, may have changedSpec-based rating
7.2/10
Chromex Flush Kit, 1 Gallon Solution
Chromex Flush Kit, 1 Gallon Solution$149.99 on Sep 30, 2026, may have changedSpec-based rating
7.2/10
Chromex Flush Kit, Solution + 1/6 HP Pump
Chromex Flush Kit, Solution + 1/6 HP Pump$134.99 on Sep 30, 2026, may have changedSpec-based rating
7.2/10
Chromex Flush Kit, Right-Angle Hoses
Chromex Flush Kit, Right-Angle Hoses$134.99 on Sep 30, 2026, may have changedSpec-based rating
7.2/10
HYDRO MASTER 3/4" IPS Service Valve Kit
HYDRO MASTER 3/4" IPS Service Valve Kit$62.46 on Sep 30, 2026, may have changedSpec-based rating
7.2/10
KAINGA 3/4" IPS Service Valve Kit
KAINGA 3/4" IPS Service Valve Kit$50.49 on Sep 30, 2026, may have changedSpec-based rating
7.2/10
Lazenta Neutralizer Kit (804000074)
Lazenta Neutralizer Kit (804000074)$62.89 on Sep 30, 2026, may have changedSpec-based rating
7.2/10
Prystene Descaler Liquid, 32 oz
Prystene Descaler Liquid, 32 oz$26.99 on Sep 30, 2026, may have changedSpec-based rating
7.1/10
6699 Flushing Kit, 1/4 HP Stainless Pump
6699 Flushing Kit, 1/4 HP Stainless Pump$89.99 on Sep 30, 2026, may have changedSpec-based rating
7.1/10
GASLAND 3" Stainless Vent Pipe Kit
GASLAND 3" Stainless Vent Pipe Kit$249.99 on Sep 30, 2026, may have changedSpec-based rating
7.1/10
Egmiku Recirculating Pump Kit
Egmiku Recirculating Pump Kit$168.88 on Sep 30, 2026, may have changedSpec-based rating
7.1/10
Rheem RH17920 Recirculation Pump Kit
Rheem RH17920 Recirculation Pump Kit$246 on Sep 30, 2026, may have changedSpec-based rating
7.1/10
FILGAUR Flushing Kit, Brushless Pump
FILGAUR Flushing Kit, Brushless Pump$59.99 on Sep 30, 2026, may have changedSpec-based rating
7.0/10
6699 Flushing Kit, 1/6 HP Pump
6699 Flushing Kit, 1/6 HP Pump$79.99 on Sep 30, 2026, may have changedSpec-based rating
7.0/10
Emnrod Neutralizer Kit (804000074)
Emnrod Neutralizer Kit (804000074)See current priceSpec-based rating
7.0/10
ZeroPone 120W Recirculating Pump
ZeroPone 120W Recirculating Pump$64.99 on Sep 30, 2026, may have changedSpec-based rating
7.0/10
Watts ETX-30 Expansion Tank, 4.5 gal
Watts ETX-30 Expansion Tank, 4.5 galSee current priceSpec-based rating
6.9/10
6699 Flushing Kit, 1/4 HP Pump
6699 Flushing Kit, 1/4 HP Pump$84.99 on Sep 30, 2026, may have changedSpec-based rating
6.8/10
BRIGHTDECK 3/4" IPS Service Valve Kit
BRIGHTDECK 3/4" IPS Service Valve Kit$45.99 on Sep 30, 2026, may have changedSpec-based rating
6.8/10
VATTCEEL 3" x 5" Vent Kit
VATTCEEL 3" x 5" Vent Kit$179.99 on Sep 30, 2026, may have changedSpec-based rating
6.8/10
Chromex Descaling Solution, 1 Quart
Chromex Descaling Solution, 1 Quart$27.99 on Sep 30, 2026, may have changedSpec-based rating
6.8/10
Chromex Descaling Solution, 1 Gallon
Chromex Descaling Solution, 1 Gallon$59.99 on Sep 30, 2026, may have changedSpec-based rating
6.8/10
Chromex Descaling Solution, 6 Quarts
Chromex Descaling Solution, 6 Quarts$117.58 on Sep 30, 2026, may have changedSpec-based rating
6.8/10
GE Expansion Tank, 2.1 gal
GE Expansion Tank, 2.1 gal$42.99 on Sep 30, 2026, may have changedSpec-based rating
6.8/10
KAINGA 48" Gas Line Hose
KAINGA 48" Gas Line Hose$19.99 on Sep 30, 2026, may have changedSpec-based rating
6.8/10
KAINGA 72" Gas Line Hose
KAINGA 72" Gas Line Hose$22.99 on Sep 30, 2026, may have changedSpec-based rating
6.8/10
ThermoMate 3" Vent Pipe Kit
ThermoMate 3" Vent Pipe Kit$249.99 on Sep 30, 2026, may have changedSpec-based rating
6.7/10
Lounsweer Neutralizer Kit (804000074)
Lounsweer Neutralizer Kit (804000074)$64.99 on Sep 30, 2026, may have changedSpec-based rating
6.7/10
Urubize Neutralizer Kit (804000074)
Urubize Neutralizer Kit (804000074)$66.48 on Sep 30, 2026, may have changedSpec-based rating
6.7/10
DiversiTech HVENT2 2" Vent Termination
DiversiTech HVENT2 2" Vent Termination$41.15 on Sep 30, 2026, may have changedSpec-based rating
6.7/10
Hourleey 3/4" IPS Service Valve Kit
Hourleey 3/4" IPS Service Valve Kit$49.99 on Sep 30, 2026, may have changedSpec-based rating
6.7/10
Janhemei 3/4" IPS Valve Kit
Janhemei 3/4" IPS Valve Kit$43.68 on Sep 30, 2026, may have changedSpec-based rating
6.7/10
LIULO TOOL 3/4" IPS Service Valve Kit
LIULO TOOL 3/4" IPS Service Valve Kit$47.49 on Sep 30, 2026, may have changedSpec-based rating
6.7/10
Roastove Water Heater Installation Kit
Roastove Water Heater Installation Kit$29.97 on Sep 30, 2026, may have changedSpec-based rating
6.7/10
Safetech Flushing Kit, 5-Gallon Lid
Safetech Flushing Kit, 5-Gallon Lid$158.67 on Sep 30, 2026, may have changedSpec-based rating
6.6/10
Long Term 3/4" IPS Service Valve Kit
Long Term 3/4" IPS Service Valve Kit$45.99 on Sep 30, 2026, may have changedSpec-based rating
6.6/10
Wosijm SP20285 Vent Termination Kit
Wosijm SP20285 Vent Termination KitSee current priceSpec-based rating
6.5/10
yes dre Condensate Neutralizer Kit
yes dre Condensate Neutralizer Kit$75.99 on Sep 30, 2026, may have changedSpec-based rating
6.5/10
JUGGHOME Expansion Tank Brackets
JUGGHOME Expansion Tank Brackets$15.99 on Sep 30, 2026, may have changedSpec-based rating
6.5/10
QwikDescaler+ Descaler, 1 Gallon
QwikDescaler+ Descaler, 1 Gallon$28.09 on Sep 30, 2026, may have changedSpec-based rating
6.5/10
QwikDescaler+ Descaler, 1 Quart
QwikDescaler+ Descaler, 1 Quart$17.97 on Sep 30, 2026, may have changedSpec-based rating
6.4/10
Clearflow Solutions Descaler, 32 oz
Clearflow Solutions Descaler, 32 oz$23.99 on Sep 30, 2026, may have changedSpec-based rating
6.4/10
Leorossy Valve Kit, PRV 3/4"-1/2" NPT
Leorossy Valve Kit, PRV 3/4"-1/2" NPT$57.68 on Sep 30, 2026, may have changedSpec-based rating
6.4/10
TIKSCIENCE 3" Direct Vent Kit
TIKSCIENCE 3" Direct Vent KitSee current priceSpec-based rating
6.4/10
VATTCEEL 2.36" Vent Kit
VATTCEEL 2.36" Vent Kit$39.99 on Sep 30, 2026, may have changedSpec-based rating
6.3/10
Blulu 3" Stainless Direct Vent Kit
Blulu 3" Stainless Direct Vent Kit$35.99 on Sep 30, 2026, may have changedSpec-based rating
6.3/10
J.C. Whitlam FLOW32 Descaler, 32 oz
J.C. Whitlam FLOW32 Descaler, 32 oz$22.67 on Sep 30, 2026, may have changedSpec-based rating
6.2/10
EFIELD TANK001 Expansion Tank, 2.1 gal
EFIELD TANK001 Expansion Tank, 2.1 gal$39.98 on Sep 30, 2026, may have changedSpec-based rating
6.2/10
EFIELD TANK002 Expansion Tank, 4.5 gal
EFIELD TANK002 Expansion Tank, 4.5 gal$60.99 on Sep 30, 2026, may have changedSpec-based rating
6.2/10
Kolasina Neutralizer Kit (804000074)
Kolasina Neutralizer Kit (804000074)$63.89 on Sep 30, 2026, may have changedSpec-based rating
6.1/10
GELRIUNY Condensate Neutralizer Kit
GELRIUNY Condensate Neutralizer Kit$72.99 on Sep 30, 2026, may have changedSpec-based rating
6.0/10
HeSun TANK001-1 Expansion Tank, 2.1 gal
HeSun TANK001-1 Expansion Tank, 2.1 gal$39.98 on Sep 30, 2026, may have changedSpec-based rating
6.0/10
Lisnhlin Neutralizer Kit (804000074)
Lisnhlin Neutralizer Kit (804000074)$62.99 on Sep 30, 2026, may have changedSpec-based rating
5.8/10
Noritz RC-7651M Remote Controller
Noritz RC-7651M Remote Controller$199.99 on Sep 30, 2026, may have changedSpec-based rating

Product images: Amazon listings

Related rankings

All rankings →
MIZUDO 199,000 BTU Natural Gas Indoor#1: MIZUDO 199,000 BTU Natural Gas Indoor · 9.2/10Best Tankless Water Heaters in 20265 models rankedFOGATTI Outdoor Propane Tankless#1: FOGATTI Outdoor Propane Tankless · 9.1/10Best Outdoor Propane Tankless Water Heaters in 20265 models rankedRheem 18 kW Electric, 240V#1: Rheem 18 kW Electric, 240V · 9.3/10Best Whole-House Electric Tankless Water Heaters in 20265 models rankedRinnai RU199iN Condensing#1: Rinnai RU199iN Condensing · 9.1/10Best High-Efficiency Condensing Tankless Water Heaters in 20265 models rankedMIZUDO 199,000 BTU Natural Gas Indoor#1: MIZUDO 199,000 BTU Natural Gas Indoor · 9.2/10Best Gas Tankless Water Heaters in 20265 models rankedMIZUDO 199,000 BTU Natural Gas Indoor#1: MIZUDO 199,000 BTU Natural Gas Indoor · 9.2/10Best Whole-House Tankless Water Heaters in 2026: Gas and Electric5 models ranked

Keep comparing

Gas tankless water heaters →Electric tankless water heaters →