
Custom Built Tanks Water, Waste and Grey Water Tanks
for boats R.V.s , trailers & what have youHenderson Plastics tank designs use high strength, advanced polyethylene and polypropylene materials that overcome the persistent corrosion and weight problems of stainless steel and the mechanical failure of flexible bag style tanks. TASTE FREE WATERWe use food grade materials in all our tank constructions. This ensures they will not corrode and provide clean, taste free water.COMPUTER AIDED DESIGNAll tanks we make are computer designed on our CAD system, the components for each tank are precision cut on one of our two CNC machining centres to the exact shape and size needed. These panels are then fitted together and welded in place using various plastics welding systems.
PRESSURE TESTING FOR RELIABILITY
As part of our commitment to quality and reliability, every water tank,is pressure tested to 4 p.s.i. ( 8' hydraulic head)
BAFFLES FOR STRENGTH AND SECURITY
Our standard specification includes baffles welded inside each tank. On larger tanks the top and baffles are locked into position by means of a interlock arrangement situated under the lid. This design feature prevents the top of the tank from lifting when under pressure.The internal baffles also stiffen the tank and reduce 'wash' thus minimising the heavy pounding forces against the tank body. We manufacture a simple bolt on access panel, which can be positioned in any location on the top or side,
CUSTOM DESIGN AND PRODUCTION
Fresh water and Black water holding tanks fabricated in polypropylene lend themselves to one-off production because there are no expensive mould tools to build. Tanks are of all welded construction and built to the customers own design, but to Hendersons demanding and proven specifications. We can produce limited curved forms,however multifaceted shapes usually solve most design problems. Please bear in mind when designing your tank that the more complicated the shape, the more expensive the tank. We offers the custom and production boat builder the ideal solution to providing tanks for storing potable water and all grades of waste. We will be pleased to help with any design problems.


- We manufacture freshwater tanks from 6mm and 9mm black polypropylene. Our in house CAD design and CNC machining means we can produce a finished product from an initial customer sketch quickly and accurately.
- We weld in all connections to the tank. These are threaded socket which can be fitted into any position on the tank, in sizes which can accept all standard hosetails or fittings which have a male bsp pipe thread.
- An access panel can be fitted as an optional item
- Tanks can usually be made to any format. Our basic design, construction and test regime will be the same for each. All we need is a dimensioned sketch indicating positions for inlet, outlet and vent and the pipe sizes being used, use our form and if you need advice call our office
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evel sensors are available from simple LED indicators to more sophisticated sensors with a gauge to indicate tank levels.
- We stock a comprehensive range of hosetail connectors, both straight and bent, plus hose pipe clips and speedfit pipe and fittings.
Black/Grey Water Tanks
- We manufacture Blackwater tanks from 6mm and 9mm black polypropylene. Our in house CAD design and CNC machining means we can produce a finished product from an initial customer sketch quickly and accurately.
- We weld in all connections to the tank. These are threaded socket which can be fitted into the top tank, in sizes which can accept all standard hosetails or fittings which have a male bsp pipe thread. Pump out connections have an internal drop tube to low level inside the tank.
- An access panel can be fitted as an optional item
- Tanks can usually be made to any format. Our basic design, construction and test regime will be the same for each. All we need is a dimensioned sketch indicating positions for inlet, outlet and vent and the pipe sizes. Use the form and if you need advice call our office
- L
evel sensors are available we supply a sensor with a gauge to give a visual indication of tank levels.
- We stock a comprehensive range of hosetail connectors, both straight and bent, plus hose pipe clips and speedfit pipe and fittings.
Battery Boxes
- Battery boxes are made as custom sizes for single or banks of batteries. Our unique design allows access for cables into each end of the box.
- Ventilated lid
- Bolt down flanges built in
- Completely acid resistant
Shower Trays
- Shower trays can be made in black natural white blue or stone colours. We have made all profiles and very often from cardboard templates.
- Sumps (as shown) can also be provided to drawings provided.
- Drain fittings from flush fitting flange connectors suitable for domestic waste pipe fittings and threaded socket can be welded directly into the trays.