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Port Plugs and Dust Caps

We carry an assortment of Replacement Port Plugs and Dust Caps for SCUBA Regulators which are interchangeable and compatible regardless of brand.

We offer 3 sizes of port plugs... but most regulators only have 2 size plugs on their first stages. Port plugs can be either a high pressure (HP) port plug or a low pressure (LP) port plug.

The most common size port plug for LP ports (BC inflator hoses, Regulator hoses) is the 3/8" size. This size is used on most brands of regulator made around the world. A few brands of first stages have a larger size low pressure port that is 1/2-inch, notably some older Apex and Aqualung models.

The most common size port plug for the HP ports (SPG, air integrated computers, transmitters) is the 7/16" size. There are a few unique regulators available that use a larger size high pressure port size of 1/2". This 1/2" size is not common and are usually found on Apeks, Mares and old Dacor regulators.

The LP 3/8" port plugs use the 4mm Hex key.
The HP 7/16" port plugs use the 5mm Hex key.
The HP 1/2" port plugs use the 5mm Hex key.

Looking for a particular fitting you don't see here? Let us know and we'll see if we can order it for you.

We reserve the right to limit order quantities to less than 10 pieces because our supply is appropriate for the demands of individual divers, but not bulk orders. Large volume bulk orders will NOT qualify for our free shipping promotion.



Product Image Item Name- Price
Sonar 1/2" Male Low Pressure Regulator Port Plug

Sonar 1/2" Male Low Pressure Regulator Port Plug

Need a Low Pressure (LP) 1/2-inch Male Port Plug for your first stage regulator? Maybe you could use one in your save-a-dive kit? Whatever the reason...
$4.00  $3.00
Save: $1.00 (25%)


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Sonar 3/8" Male Low Pressure Regulator Port Plug

Sonar 3/8" Male Low Pressure Regulator Port Plug

Need a Low Pressure (LP) 3/8-inch Male Port Plug for your first stage regulator? Maybe you could use one in your save-a-dive kit? Whatever the reason...
$4.00  $3.00
Save: $1.00 (25%)


Buy Now

Sonar 7/16" Male High Pressure Regulator Port Plug

Sonar 7/16" Male High Pressure Regulator Port Plug

Need a High Pressure (HP) 7/16-inch Port Plug for your first stage regulator? Maybe you could use one in your save-a-dive kit? Whatever the reason...
$5.00  $4.00
Save: $1.00 (20%)


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Sonar Dust Cap for DIN Regulators

Sonar Dust Cap for DIN Regulators

Sonar Dust Cap for DIN Regulators prevents sand, dust and water from entering the first stage regulator. Keeping your regulator protected from the...
$6.00  $5.00
Save: $1.00 (17%)


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Sonar Dust Cap for Yoke Regulators

Sonar Dust Cap for Yoke Regulators

Sonar Dust Cap for Yoke Regulators prevents sand, dust and water from entering the first stage regulator. Keeping your regulator protected from the...
$7.00  $5.00
Save: $2.00 (29%)


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Sonar Female DIN Regulator Dust Cap - Machined Delrin

Sonar Female DIN Regulator Dust Cap - Machined Delrin

The Sonar Threaded Dust Caps for DIN Regulators is a Female threaded DIN regulator dust cap to screw over the male DIN fitting on a first stage...
$16.00  $12.00
Save: $4.00 (25%)


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Sonar Male DIN Valve Cover Plug - Machined Delrin

Sonar Male DIN Valve Cover Plug - Machined Delrin

The Sonar Male threaded DIN Valve Cover Plug for DIN cylinder valves works with either 200-bar or 300-bar DIN valves to protect your scuba diving...
$16.00  $12.00
Save: $4.00 (25%)


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Monthly Specials For November

Sonar 3/8" Male Low Pressure Regulator Port Plug

Sonar 3/8" Male Low Pressure Regulator Port Plug
$4.00  $3.00
Save: $1.00 (25%)
Sonar Male DIN Valve Cover Plug - Machined Delrin

Sonar Male DIN Valve Cover Plug - Machined Delrin
$16.00  $12.00
Save: $4.00 (25%)

Sonar Dust Cap for DIN Regulators

Sonar Dust Cap for DIN Regulators
$6.00  $5.00
Save: $1.00 (17%)
Sonar 1/2" Male Low Pressure Regulator Port Plug

Sonar 1/2" Male Low Pressure Regulator Port Plug
$4.00  $3.00
Save: $1.00 (25%)

Sonar Dust Cap for Yoke Regulators

Sonar Dust Cap for Yoke Regulators
$7.00  $5.00
Save: $2.00 (29%)

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