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Clesse High Pressure OPSO Internally Sensed 3/4 Inch

£65.10 (£54.25 exc. VAT)
In Stock
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New Clesse High Pressure OPSO Internally Sensed 3/4 Inch Clesse 0043934AB
£ 65.1 New

The Clesse in-line over pressure slam shut (OPSO) unit protects gas installations, especially polyethylene pipework, from potentially dangerous over pressure situations. The unit is fitted after the first stage regulator. When the pressure increases above the predetermined set pressure, the OPSO unit trigger mechanism operates and the valve shuts off the gas supply. Resetting of the unit can only be achieved manually.

Suitable for LPG only

  • Maximum inlet pressure 16 bar
  • Set pressure 2.5bar (2-4).
  • Inlet 3/4" Bsp female
  • Outlet 3/4" Bsp female

Orders that are placed before 12pm Mon-Thurs will be dispatched the same day, after 12pm will be dispatched the next working day. Any orders that are placed on a Friday after 12pm will not be dispatched until Monday (or Tuesday if Monday is a Bank Holiday).

UK & Ireland

ORDER VALUE 3-4 Working days* 2 Working days* 1 Working day*
Less than £75 £5 £7 £10
£75 and above Free £2 £5
*Working day means Monday to Friday and excludes seasonal and public holidays.


For International rates and a list of the countries we ship to please see our delivery page.

Standard delivery - most items

A parcel courier or Royal Mail will deliver your item/s between the hours 08.00 - 18.30 usually within 2-4 days after your item has been dispatched (unless you have selected an express delivery option).

Over sized items

A parcel courier or pallet delivery firm will deliver your item between the hours 08.00 - 18.30 usually 2-4 days after your item has been dispatched. All large item deliveries are 'kerb side' only which means the courier will not be able to take items into your delivery address. The receiver must arrange for larger items to be taken from the driver - heavy items will need 2 persons.


After checkout you will receive a tracking number, you can track your parcel anytime after 19.00 on this day. Please note - Delivery times to some areas of Scotland, the Scottish Highlands, Islands and outside the UK mainland, excluding Ireland can vary and items can take up to 4-5 working days to reach their destination after dispatch. Please click here to see delivery transit times. In the unlikely event that we are unable to deliver in the times stated above, we will either notify you by e-mail or telephone.

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