Bare Cuff Dump Valve (on/off)

Name: Bare Cuff Dump Valve (on/off)
Brand: Bare
SKU: THD021BLK-EA
Price: 109.95 USD
Availability: OutOfStock

Bare | SKU: THD021BLK-EA

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Product Information

The Bare Cuff Dump Valve (on/off), MPN THD021BLK-EA, is a wrist valve manufactured by SI TECH and designed to fit into a SI TECH valve port on a drysuit cuff. It is spring loaded and lets a diver manually open or close the vent at the cuff. With a 49 mm diameter (including knobs) and M33 x 1.5 attachment threads, it mounts at the wrist so excess air can be dumped simply by raising the arm.

Who it is for

This valve suits drysuit divers who already have, or plan to install, a SI TECH valve port in their suit cuff and want a secondary, manually controllable venting point to fine-tune buoyancy and suit squeeze during ascents and descents. SI TECH recommends combining this valve with a SI TECH exhaust valve rather than using it as the sole venting point on a drysuit.

Key details

Diameter including knobs: 49 mm
Total height with valve port: 33 mm; exterior height: 14 mm
Attachment threads: M33 x 1.5
Pressure resistance: 2 mbar at 10 normal liters per minute
Minimum fabric hole diameter required for installation: 50 mm
Spring loaded with manual on/off control

Compatibility and sizing

This valve is built to install into a SI TECH valve port, such as item 60885 or 60895 (sold separately), and a SI TECH attachment tool, item 18417 (sold separately), is used for installation. It is not a standalone cuff fitting; a compatible valve port must already be present in, or added to, the drysuit cuff.

What's in the box

On/Off dump valve body unit

DiveCatalog.com is an authorized Bare dealer and a dive shop in Irvine, California, serving divers since 2003. Call 888-701-4017 or chat with us if you need help confirming cuff port compatibility or installation parts before you order.

⚠️ WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

Frequently Asked Questions

Can this cuff valve be used as the only vent on a drysuit?

No. The manufacturer, SI TECH, does not recommend using this cuff dump valve as the sole venting point on a drysuit. It is designed to be combined with a SI TECH exhaust valve rather than used as a drysuit's only vent.

Does the Bare Cuff Dump Valve (on/off) include the valve port for the drysuit cuff?

No. This listing is the valve body only. It is designed to fit into a separate SI TECH valve port, such as item 60885 or 60895, which must already be installed in, or added to, the drysuit cuff before this on/off valve can be fitted.

What size hole does this valve require in the drysuit cuff?

Installation requires a minimum fabric hole diameter of 50 mm in the drysuit cuff to accommodate the SI TECH valve port and this on/off dump valve. A SI TECH attachment tool, item 18417, is listed as a compatible accessory and is sold separately.

What does the 2 mbar pressure resistance rating mean for this valve?

SI TECH lists the valve's pressure resistance as 2 mbar at a flow of 10 normal liters per minute.

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Brand	Bare (SI TECH OEM component)
MPN	THD021BLK-EA
SI TECH Item Number	13320
Diameter (incl. knobs)	49 mm
Height, total (with valve port)	33 mm
Height, exterior	14 mm
Attachment threads	M33 x 1.5
Pressure resistance	2 mbar at 10 normal liters/minute
Minimum fabric hole diameter required	50 mm
Function	Spring loaded, manual on/off
Mounting location	Drysuit cuff/wrist
Compatible valve ports	SI TECH item 60885 or 60895 (sold separately)
Recommended installation tool	SI TECH attachment tool, item 18417 (sold separately)