Tankless Water Heater Flush Kit - 1 Qt w/ Right Angle Hoses

Straight hoses work when your tankless water heater has clear frontal access to its service valves. This tankless flush kit with right angle hoses is designed for every installation where that is not the case - units mounted in utility closets, mechanical rooms, alcoves, and tight wall positions where the service valve faces into a surface rather than out into open space.

The kit includes a 1/6 HP submersible pump, two 6-foot stainless steel right angle hoses, a 5-gallon bucket with lid, an elevated pump grate, and one quart of citric acid descaling solution. Everything you need in one purchase.

Why this tankless flush kit with right angle hoses solves tight installation problems

When a tankless heater sits flush against a wall or inside an enclosure, the service valves typically face inward or sideways. A straight hose requires room to run directly outward from the valve port - exactly the clearance that confined spaces do not offer.

Right angle hoses solve this with a single mechanical adjustment: the connector turns 90 degrees at the point of attachment. The hose exits sideways from the valve instead of straight out, which is the natural path when wall space is limited. No forced bends, no incomplete seals, no positioning struggle.

If your heater has full frontal valve clearance with several inches of open space in front of the ports, the standard Chromex flush kit - 1 Qt is the right choice. If your heater is against a wall or inside a cabinet, this kit removes the access problem entirely.

For confined utility spaces where the pump cord also needs extra reach, see the right angle hoses version with 25 ft pump cord.

What is included

Complete 6-piece kit. Nothing sold separately.

• Two 6-foot stainless steel right angle hoses - 90-degree connectors attach at the valve port and route the hose parallel to the wall surface

• 1/6 HP submersible utility pump - sized for residential and light commercial tankless units, moves descaling solution through the heat exchanger

• 5-gallon bucket with lid and elevated pump grate to keep the pump off the bucket floor during circulation

• 1 quart (32 fl oz) citric acid descaling solution - biodegradable, solvent-free, compatible with metal, PVC, rubber, and ABS plastic. This product is NSF Certified to NSF/ANSI/CAN 60 for drinking water treatment chemicals.

The 6-foot hose length connects to standard service valves without adapters on the majority of residential installs. The right angle connectors do not affect the flush process - cycle time, pump output, and solution effectiveness are the same as any standard kit.

Why annual descaling protects your investment

Mineral deposits - calcium, lime, and magnesium - build up inside the heat exchanger every time water passes through. Left untreated, that scale layer forces the burner to work harder, reduces hot water output, and in hard water regions like Texas, Arizona, Florida, and California, can trigger flow restriction and error codes within a few years.

The U.S. Department of Energy cites proper maintenance as essential to preserving tankless water heater efficiency. Both Navien and Rinnai recommend annual descaling in their service guidelines, and most manufacturers require documented annual maintenance to keep the warranty valid.

This kit completes the job in 30 minutes. The connector design means your installation layout is no longer a barrier to getting it done.

Compatible brands

This tankless flush kit with right angle hoses works with standard service valves on virtually all residential and light commercial units, including:

Rinnai, Navien, Noritz, Rheem, Takagi, Tempra, Bosch, EcoSmart, Stiebel Eltron, Eccotemp, Atmor, Trutankless, Marey Power, and AO Smith.

For a vinegar-based flush preferred by Rinnai and Noritz, see the Chromex flush kit with 1-gallon vinegar solution. For descaling solution refills in subsequent years, the Chromex tankless water heater descaling solution is available separately.

Browse the full Chromex tankless water heater maintenance collection to compare all kit variants.

Frequently asked questions

1. What is the difference between this kit and the standard 1 Qt flush kit?

The only difference is the hose connector angle. This tankless flush kit with right angle hoses uses 90-degree connectors that route the hose sideways from the service valve, which is required when wall clearance prevents a straight connection. The pump, bucket, grate, and descaling solution are identical across both kits. If your heater has clear frontal valve access, the standard kit works fine.

2. Will right angle hoses work on any tankless water heater?

Yes. Right angle hoses connect to the same standard service valve fittings as straight hoses. Any heater compatible with a straight hose kit works with this one. The right angle design is an accommodation for installs where straight hoses are impractical, not a limitation.

3. How long does a flush take with this kit?

Most residential tankless units complete a full flush cycle in 30 minutes or less. Connect the hoses to the service valves, run the pump to move the citric acid solution through the heat exchanger, then rinse with clean water. Step-by-step instructions are included.

4. How often should I descale my tankless water heater?

Once per year for most households. In hard water areas - Texas, Arizona, Florida, California, or Nevada - every six months is worth considering. Check your heater manufacturer's documentation for model-specific intervals.

5. Is the included citric acid solution safe?

Yes. The formula is biodegradable, non-corrosive, and NSF Certified to NSF/ANSI/CAN 60 for drinking water treatment chemicals. It is compatible with metal, PVC, rubber, and ABS plastic throughout your plumbing. No chemical residue remains after the rinse cycle.

6. Can I reuse the pump and hoses in future years?

Yes. All hardware in this kit - pump, hoses, bucket, and grate - is reusable. For annual refills, order the Chromex tankless water heater descaling solution separately. One quart covers a standard residential flush.

Key takeaways

• This tankless flush kit with right angle hoses removes the valve-access barrier in tight, wall-mounted, or enclosed installations

• Complete 6-piece kit: 1/6 HP pump, right angle stainless steel hoses, 5-gallon bucket with lid, elevated grate, and 1 qt citric acid descaler NSF Certified to NSF/ANSI/CAN 60

• The right angle design does not change the flush process - same 30-minute cycle, same pump output, same solution performance

• Compatible with Rinnai, Navien, Noritz, Rheem, Takagi, Bosch, EcoSmart, and most major residential brands

• Annual flushing protects manufacturer warranty and prevents heat exchanger damage from mineral buildup

• Pump and hoses are reusable - order descaling solution refills for subsequent annual flushes