Cylinders & Valves

Cylinders, valves and manifolds for single-tank, twinset and stage diving. We stock steel and aluminium cylinders from ECS, Luxfer, MES and Hydrotech, alongside DIRZone valves, manifolds and oxygen-clean spares. Capacity, working pressure, diameter and fittings all vary from model to model, so check the manufacturer specification for anything you are considering — or talk to us, and we will help you match a cylinder to the diving you actually do.

Row of diving cylinders showing cylinder valves

Expert advice
Talk to divers who use the kit we sell.
Servicing and repairs
Regulators, cylinders, drysuits, BCDs and computer batteries.
Rutland dive centre
A real shop in Oakham, with training and pool sessions.
UK delivery
Posted across the UK. Ask about lead times on special orders.

Choosing a cylinder

The right cylinder is the one that carries the gas you need without wrecking your trim. Capacity is the obvious number, but diameter, length, weight and the way buoyancy changes through a dive matter just as much once it is on your back. Those figures differ between steel and aluminium, and between individual models of both, so check the manufacturer specification before you commit.

If this is your first cylinder, our guide to purchasing a cylinder covers what to look at, and Air Planning is worth reading alongside it — knowing your own gas consumption is what turns a capacity figure into a decision.

Valves, manifolds and spares

We stock single-outlet and modular valves, left- and right-hand valves for twinsets, isolation manifolds, blanking plugs, second outlets and the spare part kits that keep them serviceable, including oxygen-clean versions. Threads and pressure ratings are specific to the valve, so match parts to the cylinder you actually have rather than to one that merely looks similar. Check the manufacturer specification, and ask us if you are unsure.

Adapters between DIN and A-clamp fittings, cylinder boots, bands and protective covers live in our Cylinder Accessories collection.

Enriched air and oxygen

A cylinder destined for enriched air or oxygen carries requirements of its own around cleanliness and labelling. We blend nitrox and supply oxygen in the shop, and our Air and Gas Fills page sets out what we need before we can fill a cylinder for you. If enriched air is new to you, Enriched Air (Nitrox) Explained is the place to start.

Ask us rather than assume

Cylinders are pressure vessels, and what holds true for one will not always hold for the next. We would rather you asked us than took a general rule from a web page. If you want a valve fitted, a cylinder looked over, or a second opinion before you buy, give us a call or come into the shop.

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Frequently asked questions

It comes down to your gas consumption, the depth and duration you actually dive, and how the cylinder sits on you in the water. Capacity, working pressure, diameter, length and weight all vary from model to model, so check the manufacturer specification for the cylinder you are considering rather than assuming figures carry across. If you would like help matching a cylinder to the diving you do, talk to us — we dive these waters ourselves and can walk you through the options.

A DIN valve takes a regulator that screws into the valve, capturing the O-ring inside the fitting. An A-clamp valve — also called INT or yoke — takes a regulator that clamps over the face of the valve. The two are not interchangeable without an adapter, and adapters are specific to the fitting and the pressure they are built for, so check the manufacturer specification. If you are not sure which your regulator uses, bring it in and we will look at it with you.

Yes — we fill air, enriched air (nitrox) and oxygen on site. There are conditions a cylinder has to meet before we can fill it, and our Air and Gas Fills page sets out exactly what we need, including how we handle nitrox blending. Please have a read before you come in, or give us a call and we will tell you where you stand.

Steel and aluminium cylinders differ in weight, diameter and how their buoyancy changes across a dive, and those figures vary between individual models as much as between the two materials. Check the manufacturer specification for the cylinder you are looking at, and talk to us before you commit — the choice affects how much lead you carry and how the cylinder trims out on your back, so it is worth getting right first time.