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Custom-Water-and-Waste-Tank-Fittings-Guide
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Catalog excerpts

Custom-Water-and-Waste-Tank-Fittings-Guide - 1

CUSTOM WATER AND WASTE TANK DESIGN GUIDE This sheet has been designed to help you decide which type of fittings and accessories you require on your custom built tank. There are five points you need to address. • • • • • Hose Tail Fittings Avoiding Internal Baffles Inspection Hatches Senders The Tank Drawing These sections are described in detail in the following pages. Check off each heading as you cover them. You may decide that a sender is not necessary as you will be able to see the contents through the tank wall, so just ignore that section. Hose Tail Fittings First decide where the fittings need to go. Once you have established the position, the size has to be decided. Once the size has been decided, you need to check on the chart for the overall height or length of the fitting. This height or length can then be checked against the tank design to see if there are any problems with clearance. For example, you may have a clearance above your tank design of 75mm and want to fit an 1 ½” elbow inlet. This would not be possible as an 1 ½” elbow actually stands up 95mm and would foul whatever is above the tank. The tank height would then have to be reduced by 20mm to allow for the fitting. Please note that all fittings whether straight or elbows are screwed onto a BSP threaded male adaptor, which is permanently welded to the tank. All adaptors will stand 24mm off the tank face when the fitting is removed. Dimension B includes the adaptor. Each fitting needs to be checked against the tank design and the boat structure to avoid any problems later when the tank is fitted. Time spent now checking the size and position of each fitting will pay off, as it is normally not possible to modify the tank. Please see the back of this sheet to see a typical custom tank drawing and how the fittings should be marked up. You may wish to provide the information in a different format, which is not a problem as long as all the information is clear. If a dip pipe is required, for example an outlet on the top of the tank, then please add the suffix DP to the fitting type. e.g. an 1 ½”elbow outlet on the top face will be shown as E5DP. All elbows are multi directional; hence the direction they need to point does not need to be shown. Once the tank is installed they can be swivelled in the right direction and the locknut tightened. E6 E5 E4 ELBOWS E3 E2 Photo is unavailable E1 STRAIGHTS

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Custom-Water-and-Waste-Tank-Fittings-Guide - 2

BSP Threaded Male Adaptor welded to tank face. Adaptors are NOT removable ELBOWS Fitting Type E1 E2 E3 E4 E5 E6 Hose Bore (A) 13mm 16mm 20mm 25mm 38mm 50mm STRAIGHTS Height (B) 60mm 62mm 70mm 74mm 108mm 110mm BSP (D) ¾” ¾” ¾” 1” 1 ½” 2” Fitting Type S1 S2 S3 S4 S5 S6 Hose Bore (A) 13mm 16mm 20mm 25mm 38mm 50mm Height (B) 64mm 64mm 68mm 74mm 92mm 100mm Avoiding Baffles When designing your tank, it is important that the fittings avoid any baffles that we put in. A custom tank can have fittings in almost any position, the only restriction being the baffles. Nearly all custom built tanks will...

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Custom-Water-and-Waste-Tank-Fittings-Guide - 3

The 200 Standard nuts and bolts hatch is manufactured from the same material as the tanks (HDPE) and comes with 18 x M8 studs fixed from inside the tank. The hatch seats on a 3mm thick nitrile gasket and is fixed with 18 x M8 nuts and washers. Fitting and removal requires a spanner. The Henderson TCL4 hatch is a larger unit and stands slightly higher. This hatch seats on a 3mm nitrile gasket and is fastened with 20 x M5 button head screws. This is more suitable for quick access as it only requires a few turns and does not need any tools. The Wem a hatch is the smallest and is ideally suited...

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Custom-Water-and-Waste-Tank-Fittings-Guide - 4

Tank design using computer 180 180 B A A 600 E 250 250 C AFT D FWD 300 PLAN VIEW 300 1200 FITTINGS A = HENDERSON TCL4 HATCH B = S5 C = S5 D = E5DP E = E5DP 300 FRONT VIEW Hand drawn tank design Y:\Word\Tek-Tanks \Data Sheets\CUSTOM WATER AND WASTE TANK FITTINGS GUIDE.doc WASTE HOLDING TANK MR. J. BLOGGS Telephone 01234 567899 Mobile 07777 888888

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