12L Eurocylinder Twinset - Flat Bottom (Concave)

BESTSELLER▸ Fully assembled O2 clean 12L Eurocylinder Twinset with Flat Bottom (Concave), high-quality BtS stainless steel twinning bands, and manifold with an isolator.

These flat-bottom manifolded doubles are our best sellers. With a working pressure of 232 bar, the twinset stands independently, thanks to a concave bottom. They are assembled with robust 2-inch wide marine-grade stainless steel BtS twinning bands featuring Delrin thumbwheels. The dependable barrel-type reliable BtS manifold and valves complement the sets.

All our twinsets are shipped in the UK fully assembled and come with O2 clean VIP stickers and decals as of the month of purchase. All sets are tested to working pressure and depressurised before shipping by courier allowing you to adjust the centre manifold before your first fill.

If you collect your 12L Euro twinset in-store from Portland, you get a FREE air or 32% Nitrox fill too. UK mainland delivery is available for a small additional charge. For any other destination, please contact us before placing an order.

12L Eurocylinder Twinset specification

• O2 clean for 15 months from the date of purchase
  
• Working Pressure: 232 bar
• Cylinder diameter: 171mm
• Cylinder length without valve: 69cm
• Average cylinder weight without valve: 14.5-15.1 Kg
• Barrel type BtS Manifold (M25)
• Marine grade stainless steel BtS Bands
  

Ordering from outside of the UK mainland?

12L Eurocylinder Twinset do not qualify for our standard shipping fees due to the shipping costs. If you want these delivered outside the UK mainland, contact us using our ONLINE CONTACT FORM with your delivery address. We are then able to provide you with a non-binding shipping quote.

New to manifolds and twinsets? FAQ: See how it works

When the manifold centre valve is in the “open” position, both cylinders will be equalised, acting as a larger gas supply whether the diver is breathing off the primary or backup regulator.

As long as the left and right-hand valves remain open, each regulator will provide access to what is now a single gas supply.

When the manifold valve is in the “closed” position, the cylinders will be isolated from one another and run independently, effectively creating two separate gas supplies accessed respectively by the backup or primary regulator.

The main advantage of the twinset manifold is that it provides redundancy in case of failure involving either side. Closing the manifold valve will effectively isolate one cylinder (one side) from the other, providing the diver with the remaining gas from the valve on the functioning side.

If the manifold is in an open position but either the left or right-hand cylinder valve is closed, the regulator connected to that valve (post) will not allow access to the gas in any of the cylinders.

That post's valve will have shut down gas flow to the regulator attached to it, even if the manifold valve itself is open. However, the regulator on the open post will still have access to the total gas supply (both cylinders) unless the manifold is closed.

SHIPPING:

We aim to dispatch all in-stock items within 2 working days but will inform you of approximate delivery times should any item on your order be out of stock or on supplier backorder due to current manufacturing or transport delays caused by global shortages and/or impeded production.

Please refer to our Shipping Policy and Returns & Refunds Policy for detailed information on delivery terms and returns.

Our current shipping rates are as follows:

• UK mainland orders £45 and over: FREE
• UK mainland orders under £45: £4.90 Fixed Rate
• Scottish Higland and Islands & Isle of Man: £9.90 Fixed Rate
• Channel Islands & Northern Ireland: £14.90 Fixed Rate
• European Union: £13.90 + 5% of order value (maximum £30)
• Rest of the World: £19.50 + 8% of order value (maximum £55)
• BFPO Post Codes: £20

INTERNATIONAL EXCEPTIONS:

For international orders containing weights, cylinders (excluding suit inflation bottles) and Suex scooters please contact us in advance before placing your order.

These products are not included in our global max-capped shipping rates and are only shipped outside of UK mainland after freight cost is calculated based on total weight, dimensions of parcel, location of delivery and the courier service used. We will let you know what this cost will be before processing any order.

All cylinders we ship within and outside of UK mainland are filled and tested on site before being emptied for dispatch. Cylinders shipped outside of the UK will be empty and will also have their valves removed, requiring reassembly after you receive delivery. Twinset manifolds and bands will also be removed and dispatched together with the cylinders for safe global shipping.

RETURNS & REFUNDS

We offer a 30 day return for any product sold under our Returns & Refunds Policy Please contact us before any return with your order number and date details. Receive our Returns Authorisation Form and instructions and enclose them with your return to expedite a refund. Detailed information is available in our Returns & Refunds Policy.

Email us at sales@dirdirect.com or call us on +44(0)1305 824 555

Note that all returned items are shipped at the customer's own risk and remain the customer's property until received by Underwater Explorers, so please ensure they are packaged well and use reliable postal services with tracking facilities. The goods will be inspected on arrival. 

Return postages are at your own cost and our outbound shipping costs (if items are sold with integrated basic shipping charges i.e. Free shipping for orders £45 and above) the UK shipping rate may be deducted from any UK mainland refund unless linked to a fault/defect claim. 

Please contact us with your order number and name before sending any returns to:

Underwater Explorers – Returns
Unit 1, Maritime Business Centre
Mereside, Portland
Dorset, DT5 1FD 
United Kingdom

Please refer to our Shipping Policy and Returns & Refunds Policy for detailed information.