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VEVOR Tankless Water Heater Flushing Kit FSP4007DW-15L: what's included
A tankless water heater descaling kit with a 1/3 HP submersible pump, two hoses, a pail and adapters. What the specs mean and what to check before using it.
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Tankless water heaters can build up mineral scale inside their heat exchangers, especially where the water is hard. The VEVOR Tankless Water Heater Flushing Kit (model FSP4007DW-15L) gives you a pump, hoses, a pail and adapters to circulate a cleaning solution through the unit. It is meant for the periodic flush that heater makers typically describe in their manuals.
What flushing does
A flush works by pumping a descaling liquid, often a mild acid such as vinegar or a product the heater's maker approves, out of a pail, through the heater and back again. The liquid dissolves scale as it circulates. A separate pump is needed because the heater's own flow is not designed for this. VEVOR describes the kit as made for descaling and cleaning water heaters.
The pump
The kit's submersible pump is rated at 1/3 HP, with a pump speed of 1,980 GPH (gallons per hour) and a head of 16 feet. Head is how high the pump can lift water, which affects how well it can push liquid through a heater that sits above the pail. VEVOR describes the pump as waterproof, with a design that keeps water out of the interior.
The hoses
Two hoses are included. VEVOR says each has a PVC coating over a high-density woven stainless steel tube, giving leak and rust resistance and making it less prone to breaking. The brand adds that this construction reduces the burr problems that bare metal tubes can have. Two adapters connect the hoses to the heater's service ports; check that these match your fittings.
What's in the box
- Submersible pump
- Two hoses
- A pail (VEVOR gives 3.7 gallons, about 14 litres; the model name suggests 15L)
- A plastic wrench
- Two adapters
The packaged unit measures about 5.3 x 5.3 x 9.6 inches (13.5 x 13.5 x 24.4 cm) and weighs 9.4 lb (about 4.3 kg).
How it is used
VEVOR says installation takes four steps. In general terms, you shut off the water and power or gas to the heater as the manual directs, connect the hoses to the service valves, put the solution in the pail, run the pump for the time the manufacturer specifies, then rinse with clean water and restore everything. Follow your water heater's manual and local codes, especially for gas models, and do not skip the shutoff steps. Check which descaling liquid the heater maker permits, and use it only as that maker and the liquid's own label direct.
Who it suits
It suits owners of tankless heaters who prefer to do the routine descaling themselves, and anyone maintaining several heaters who wants a reusable kit.
What to check before you buy
- Heater compatibility: confirm your heater has service valves or ports that suit the adapters.
- Connection sizes: check hose and adapter thread sizes against the valves.
- Cleaning liquid: use only what your heater's manual allows, and check that it suits the hose and pump materials.
- Pail size: check that 3.7 gallons holds enough solution for your unit.
- Power: the pump needs a nearby outlet; keep electrical parts clear of spills, as the manual describes.
- Interval: the heater maker's manual typically gives how often to flush.
The short version
- A tankless water heater descaling kit with a 1/3 HP submersible pump (1,980 GPH, 16-foot head).
- Two hoses with PVC coating over woven stainless steel tube, a 3.7-gallon pail, a plastic wrench and two adapters.
- VEVOR describes a four-step installation.
- Follow the heater's manual and local codes for the procedure and cleaning liquid.
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