The Tank and Drum Experts - for fast delivery or collection - 01594 833308 or 01594 833459    
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Listed prices are all plus VAT at 20%.
For fittings and smaller items, please order by 2:00pm for same day dispatch. All post is sent First Class via Royal Mail.  
For larger items please order by 11am for same day dispatch.  Larger items take 2-4 days.  Next day delivery option available.
Minimum order is £9.50 plus postage and VAT.

When ordering larger quantities choose the
'D/ Heavy, larger package - Tracked Next Day, UK postcodes'
it may often be the cheapest option and will be delivered the next day by courier if ordered before 11.00 am.

You are always very welcome to call in and collect from our Gloucestershire premises.  Most items are from stock, though it is always best to ring to be sure.  
Yard Opening hours:
Normal hours: Weekdays - 8.15 till 4.30  (sometimes when super-busy we have to close between 1 and 2 o'clock, if you need to come at this time phone us)
Saturdays - 9  till 11.  We are closed on Bank Holiday weekends.
Telephone: 01594 833308 or 01594 833459
Main website:
Home > Bosses, Bends, Back Nuts & Bungs/Plugs

Plastic Bosses

These enable you to fit an outlet to your tank by giving a standard BSP thread into which you can screw another fitting, e.g. tap or hose tail. They are inserted and screwed into a tank and are secured at the back using the back nut. More detailed instructions can be found below.

The boss has three pieces. The main plastic body that has an external male thread and a female inside thread, a large rubber seal, and a back nut for securing the boss onto the tank. Both the outside male thread and the inside female thread come in BSP sizes. The female thread size is what determines the size of the fitting you can screw into it.

In the drop down menu below a range of sizes are indicated. The larger number is always the male thread (the size of hole you need in the tank) and the female thread is the smaller (the size of fitting that can be fitted).

To fit a boss into a tank, simply drill a hole into the tank where you wish to site it. Please note the hole has to be bigger than the male thread size. The seal will prevent leakages. Make sure that the location you choose can be reached manually as the back nut will need to be tightened.


Price: £12.50

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