Santi Thermovalve 303
Dispatched in 1 to 2 days
The innovative Santi Thermovalve 303 has a 270 degree rotating head that offers two functions in one device: drysuit inflation valve with an integrated connector for Santi heating systems.
Apeks or SiTech
Santi Thermovalve 303 – Advanced Heating and Inflation
The Santi Thermovalve 303 features a unique 270-degree rotating head to improve your diving experience. This innovative design offers a superior solution for both drysuit inflation and integrated heating power.
Unlike a Drysuit Connector, this low-profile unit fully replaces your existing drysuit inflator valve. Consequently, it streamlines your gear by combining two essential functions into one robust component. Built-in cabling connects directly to Santi heating systems, including heated undersuits, vests, and gloves.
Optimal Cable Routing and Flexibility
A significant advantage of the Thermovalve 303 is the clever placement of the E/O connector cable. By positioning the cable in the down position, the valve head can turn freely by 270 degrees. This rotation allows for a trouble-free connection in both the right and left positions.
Therefore, you can customise your technical diving setup to suit your specific hose-routing preferences. This flexibility ensures that your external battery cable remains secure and out of the way during complex dives.
Technical Compatibility and Integration
The Santi drysuit valve for heating works with any power supply up to 12V. It features two electrical connectors on opposite sides of the cable for seamless integration. One side provides a standard e/o connection for your battery, while the other links to your heated garment.
Furthermore, the total cable length is approximately 55cm, providing ample reach inside your suit. Santi offers this valve in both Apeks and Si-Tech screw sizes to fit most drysuit brands.
Santi Thermovalve 303 Product Highlights
- 270° rotating valve head allows for optimal cable settlement and reduces strain on the E/O cord.
- Dual-function design replaces the standard inflator valve, providing both air and thermal power.
- The integrated E/O connector ensures a reliable, waterproof connection to your external dive battery.
- 55cm of internal cabling provides sufficient length to reach heated vest or undersuit connections.
- Universal fit options include compatibility with both Apeks and Si-Tech valve ports.
- Complete kit includes a two-piece mounting nut and a protective e/o blind plug.
Read our SANTI Thermovalve and Drysuit Connector comparison
Santi Heating Systems at glance

SHIPPING & RATES
You can find our current shipping rates in our Shipping Policy & Rates.
We aim to dispatch all in-stock items within 2 working days. The Dispatch Days listed in our product listings refer to working days.
We 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.
INTERNATIONAL EXCEPTIONS
Please contact us in advance for a shipping quote before placing an international order for weights, cylinders (excluding suit inflation bottles), and Suex scooters. These products are not included in our global max-capped shipping rates.
They are only shipped outside the UK mainland after the freight cost is calculated based on the parcel's total weight, dimensions, delivery location, and the courier service used.
RETURNS & REFUNDS
We offer a 30-day return for any product sold under our Returns & Refunds Policy.
Please email us at sales@dirdirect.com with your order number to receive our Returns Authorisation Form and instructions.
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 above certain amount) the current UK shipping rate will be deducted from any UK mainland refund unless linked to a fault/defect claim.































