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O-Rings and Lubricants

The Scuba Doctor sells O-rings and lubricants suitable for use in scuba applications. For more information, please see our buyers guide to Scuba Diving O-Rings, or download/view our Scuba O-Ring Sizes Chart (Adobe PDF | 356.37 KB).

Tech Tip:
How Much and Where to Use Lubricant

Some people very sparingly lubricate the SPG swivel O-rings, but you should know that SPG and hose assemblies from our suppliers are never lubricated. If you do choose lube the SPG swivel o-rings, take care not to be so generous that lube might migrate up into the Bourdon tube mechanism and cause your SPG to become inaccurate.

Some people also sparingly lubricate the threads of valves before they are installed in the cylinder neck. Do NOT lubricate the neck O-ring itself, and do not lubricate the valve/regulator seal O-ring or DIN threads.

Most lubricant is used with dynamic seals in regulators and other equipment with moving parts. As a general rule, the O-rings used with static seals in SCUBA applications should not be lubricated at all. The lubricant just causes contamination to stick to the surface of the O-ring and results in more problems with a static seal than any dubious benefit the lubricant might provide.

The Quarry, Cape Grant

Reef Dive Reef Dive | Boat access Boat access

Abalone Dive Site Crayfish Dive Site Open Water Rated Reef Dive Site Spearfishing Site

Cape Grant Dive Sites
Cape Grant Dive Sites
© The Scuba Doctor Australia

Depth: 5 m (16 ft) to 15 m (49 ft)

Level: Open Water and beyond.

The Quarry is a boat dive site on the eastern side of Cape Sir William Grant, offshore from the Portland Harbour Trust Quarry, six kilometres south of Portland on Victoria's Discovery Coast. This cape represents the core of a volcanic complex between two collapsed calderas which underlie Nelson and Grant Bays to the west and east respectively.

Diving at The Quarry

This site offers weed covered reef with big ledges and plenty of marine life right next to the Portland aluminium smelter. Road access to the quarry area has now been blocked off, so a shore dive here is no longer an option.

Location: Cape Sir William Grant, Portland, Victoria 3305

Ideal Conditions: Best dived in good conditions with a low swell with light offshore winds. See WillyWeather (Cape Sir William Grant) as a guide for the tide times and the height of the tide.

Access is by boat from the Portland Harbour, Lee Breakwater Road North Ramp or the Portland Harbour, Lee Breakwater Road South Ramp.

Abalone Dive Site
Abalone Dive Site
© Mark Norman, Museum Victoria

Divers have the opportunity to catch Abalone at this dive site. Remember your catch bag, legal abalone tool, current Victorian Recreational Fishing Licence, and abalone measure. Please abide by all current fishing regulations if you intend to catch abalone.

See article-catching-abalone for practical abalone hunting advice from The Scuba Doctor, plus melbourne-abalone-dives for a list of other Abalone dive sites near Melbourne.

Crayfish Dive Site
Crayfish Dive Site | © Ian Scholey

Divers have the opportunity to catch Southern Rock Lobster (aka Crayfish) at this dive site. Remember your catch bag, current Victorian Recreational Fishing Licence, rock lobster measure, and cray tags. Once you get back to the dive boat, or shore, make sure you clip the tail and tag your Crayfish as per Fisheries requirements. Please abide by all current fishing regulations if you intend to catch crays. See article-catching-crayfish for practical cray hunting advice from The Scuba Doctor, plus melbourne-cray-dives for a list of other crayfish dive sites near Melbourne. For tips on cooking your Crays, please see article-cooking-crayfish.

Gunditjmara country
Gunditjmara country

Traditional Owners — This dive site is in the traditional Country of the Gunditjmara people of far south-western Victoria which continues over the state border into a small part of south-east South Australia and is bordered by the Glenelg River to the west and the Wannon River in the north. This truly ancient Country extends 100 metres out to sea from low tide and also includes Deen Maar (aka Lady Julia Percy Island) where the Gunditjmara believe the spirits of their dead travel to wait to be reborn. We wish to acknowledge the Gunditjmara as Traditional Owners. We pay respect to their Ancestors and their Elders, past, present and emerging.


The Quarry, Cape Grant Location Map

Latitude: 38° 24.276′ S   (38.404602° S / 38° 24′ 16.57″ S)
Longitude: 141° 37.700′ E   (141.628341° E / 141° 37′ 42.03″ E)

Datum: WGS84 | Google Map
Added: 2022-05-18 05:20:45 GMT, Last updated: 2022-05-23 16:21:05 GMT
Source: Google Earth
Nearest Neighbour: Grant Bay Reef, 1,073 m, bearing 30°, NNE
Cape Sir William Grant, Portland, Discovery Coast.
Depth: 5 to 15 m.

DISCLAIMER: No claim is made by The Scuba Doctor as to the accuracy of the dive site coordinates listed here. Should anyone decide to use these GPS marks to locate and dive on a site, they do so entirely at their own risk. Always verify against other sources.

The marks come from numerous sources including commercial operators, independent dive clubs, reference works, and active divers. Some are known to be accurate, while others may not be. Some GPS marks may even have come from maps using the AGD66 datum, and thus may need be converted to the WGS84 datum. To distinguish between the possible accuracy of the dive site marks, we've tried to give each mark a source of GPS, Google Earth, or unknown.


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