Tankless Flush Kit
Tankless flush kits and maintenance supplies keep heat exchangers clean, efficient, and under warranty. Build your setup with a recirculating pump, service hoses, isolation/flush valves, and a safe descaling solution—then add filters and neutralizers for long-term protection.
Shop by need
- Complete flush kits: pump + hoses (and bucket on select kits) for annual descaling
- Isolation/flush valve sets: hot/cold service valves with drain ports for easy maintenance
- Descalers: citric/biodegradable cleaners and white-vinegar alternatives; manufacturer-specific solutions
- Filters & scale prevention: sediment filters, scale inhibitors, and replacement cartridges
- Condensate neutralizers: inline kits and media refills for condensing units
- Accessories & parts: service port gaskets/caps, hose washers, test strips, and replacement pumps/hoses
Quick choosing guide
- Confirm your valves: if you don’t already have isolation/flush valves on the heater, add a valve set with service ports first.
- Pick a kit: choose a complete kit for first-time maintenance or pump/hoses only if you already have valves and cleaner.
- Choose the cleaner: use a manufacturer-approved or citric-based descaler. Avoid harsh acids; follow the label for dilution.
- Protect against future scale: add a sediment filter and (in hard water) a scale-inhibitor ahead of the heater.
- Condensing units: install or refresh a condensate neutralizer to protect drains and meet code.
Flush basics (always follow your manual)
- Turn power/gas off and close hot/cold isolation valves. Relieve pressure.
- Connect hoses to the service ports; place pump intake in descaler solution and return hose into the bucket.
- Open service ports and recirculate 45–60 minutes (or per cleaner instructions).
- Drain, then flush with clean water 5–10 minutes. Close ports, remove hoses, and restore power/gas.
- Check for leaks and run a hot-water tap to purge air.
How often? Typical interval is every 6–12 months (more often with hard water or heavy use).
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Whitlam - Flow-Aide System Descaler Kit
WhitlamOriginal price $ 162.00 - Original price $ 162.00Original price$ 162.00$ 162.00 - $ 162.00Current price $ 162.00| /Install Manual Complete Descaler Kit, Includes: 3.5 Gallon Bucket, 800 GPH Pump, 2 Rubber Hoses, 1 Quart FLOW-AIDE® (FLOW32). FLOW AIDE® System Des...
View full detailsOriginal price $ 162.00 - Original price $ 162.00Original price$ 162.00$ 162.00 - $ 162.00Current price $ 162.00| / -
EWS - BB-GUARD-FILTER-3/4 – Replacement Filter Cartridge for EWS Heater Guard ¾″
EWSOriginal price $ 111.75 - Original price $ 111.75Original price$ 111.75$ 111.75 - $ 111.75Current price $ 111.75| /The BB-GUARD-FILTER-3/4 is the official replacement filter cartridge for the EWS Heater Guard ¾″ system. Built with a 5-micron pre-sediment cartrid...
View full detailsOriginal price $ 111.75 - Original price $ 111.75Original price$ 111.75$ 111.75 - $ 111.75Current price $ 111.75| / -
Whitlam - FLOW AIDE System Descaler (1 Gallon)
WhitlamOriginal price $ 51.80 - Original price $ 51.80Original price$ 51.80$ 51.80 - $ 51.80Current price $ 51.80| /Install Manual FLOW AIDE® System Descaler quickly dissolves water scale, lime, rust, and other water formed deposits, restoring efficiency to most ...
View full detailsOriginal price $ 51.80 - Original price $ 51.80Original price$ 51.80$ 51.80 - $ 51.80Current price $ 51.80| / -
Whitlam - FLOW AIDE System Descaler (1 Qt)
WhitlamOriginal price $ 21.49 - Original price $ 21.49Original price$ 21.49$ 21.49 - $ 21.49Current price $ 21.49| /Install Manual FLOW AIDE® System Descaler quickly dissolves water scale, lime, rust, and other water formed deposits, restoring efficiency to most ...
View full detailsOriginal price $ 21.49 - Original price $ 21.49Original price$ 21.49$ 21.49 - $ 21.49Current price $ 21.49| / -
Rinnai - MIVK-T-LW - Matsui Plumbing Isolation Valve Kit
RinnaiOriginal price $ 93.00 - Original price $ 93.00Original price$ 93.00$ 93.00 - $ 93.00Current price $ 93.00| /Rinnai Isolation Valve Kit The Rinnai MVIK-T-LW tankless water heater valve kit facilitates a streamlined, two-step installation process for your ...
View full detailsOriginal price $ 93.00 - Original price $ 93.00Original price$ 93.00$ 93.00 - $ 93.00Current price $ 93.00| / -
EWS BB-GUARD-FILTER-1.5 – Replacement Filter Cartridge for EWS Heater Guard 1.5″
EWSOriginal price $ 186.75 - Original price $ 186.75Original price$ 186.75$ 186.75 - $ 186.75Current price $ 186.75| /BB-GUARD-FILTER-1.5 – Replacement Filter Cartridge for EWS Heater Guard 1.5″ The BB-GUARD-FILTER-1.5 is the official replacement filter for the EWS...
View full detailsOriginal price $ 186.75 - Original price $ 186.75Original price$ 186.75$ 186.75 - $ 186.75Current price $ 186.75| / -
EWS Heater Guard 3/4″ – Sediment & Scale Protection for Water Heaters
EWSOriginal price $ 365.25 - Original price $ 365.25Original price$ 365.25$ 365.25 - $ 365.25Current price $ 365.25| /Water Heater Protection — EWS Heater Guard 3/4″ Extend the life of your water heater and avoid costly repairs with the EWS Heater Guard 3/4″. This ...
View full detailsOriginal price $ 365.25 - Original price $ 365.25Original price$ 365.25$ 365.25 - $ 365.25Current price $ 365.25| / -
Rinnai 804000074 Condensate Neutralizer Kit
RinnaiOriginal price $ 151.05 - Original price $ 151.05Original price$ 151.05$ 151.05 - $ 151.05Current price $ 151.05| /Rinnai Condensate Neutralizer Kit The Rinnai 804000074 Condensate Neutralizer Kit is designed to provide reliable and efficient performance, design...
View full detailsOriginal price $ 151.05 - Original price $ 151.05Original price$ 151.05$ 151.05 - $ 151.05Current price $ 151.05| / -
EWS Heater Guard 1.5″ – Sediment & Scale Protection for Larger Water Heaters
EWSOriginal price $ 423.75 - Original price $ 423.75Original price$ 423.75$ 423.75 - $ 423.75Current price $ 423.75| /EWS Heater Guard 1.5″ – Sediment & Scale Protection for Water Heaters The EWS Heater Guard 1.5″ is a rugged inline protection unit designed for...
View full detailsOriginal price $ 423.75 - Original price $ 423.75Original price$ 423.75$ 423.75 - $ 423.75Current price $ 423.75| / -
Rectorseal - 68711 - Calci-Free Flush Kit
RectorsealOriginal price $ 409.30 - Original price $ 409.30Original price$ 409.30$ 409.30 - $ 409.30Current price $ 409.30| /Spec Sheet Calci-Free Tankless Water Heater Flush Kit includes everything you need to safely and effectively remove scale and mineral deposits from...
View full detailsOriginal price $ 409.30 - Original price $ 409.30Original price$ 409.30$ 409.30 - $ 409.30Current price $ 409.30| /
Pro tips: Label service valves “hot/cold,” replace hose washers each season, and keep a spare bottle of descaler on the shelf. Add inlet filtration to reduce future scale, and refresh neutralizer media yearly on condensing units. Not sure which kit fits? Tell us your heater brand/model, valve size (3/4" or 1"), and water hardness—we’ll build a dialed-in maintenance package.
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