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The Rez was formerly a Severn Trent Water Authority Reservoir, which was an open water facility in the mid 1800’s. There were two large pump houses on-site which house the steam beam engines that pumped the water from the bottom of the valley where the Rez is situated to the towns and villages of Stoke- on Trent. With the progression to electric pumps, one pump house was demolished and a smaller building constructed in its place and the remaining large pump house was reduced by one storey. The chimney that used to tower a further sixty feet above the two buildings was demolished and buried in the bank-sides around the site.

The reservoir was given baffled walls made of engineering brick and a series of supporting columns throughout to support a new reinforced concrete roof. What is now the Dive House was the Gas House, where the chlorine and other water purification mixtures were added and the water quality monitored.

The buoyancy tank was the aeration tank for the reservoir. The two bottom layers have been removed and a fountain restored.

The water in the Rez is fresh water as the whole of Wall Grange is a clean water site due its environmentally sensitive location.

Due to its nature, The Rez is a serious undertaking and can only be dived by suitably experienced and qualified divers.

All divers must…

  • Belong to a registered governing body.
  • Hold the minimum qualification to allow safe diving
  • Be dry suit trained with a minimum of five open water dives in a dry suit.
  • Be medically fit to dive according to The Rez membership terms and conditions.
  • Be partnered, no solo diving.
  • Be confident in a total darkness environment
  • Be prepared for the cold. Temperature range throughout the year between 5°C and 9°C...

Total darkness diving. The Rez is a 40m x 20m pitch black diving environment.
At only 2m the dive experience is relatively safe but very deceptive, spatial awareness is altered by the darkness and the internal structure of the facility.
Even the shallowest of water presents a danger, so The Rez has a full 0.5 m of airspace throughout.

Opening Times:
Tue – Sun 09:00 – 17:00

Session Timings:
09:00 – 11:00
11:00 – 13:00
13:00 - 15:00
15:00 – 17:00

Closed Mondays

We request that divers car share where possible, as parking is limited and to aid the environmental preservation of the area.

Dive Prices:
Annual membership: £14.00
Member Dive Session: £9.00
Non-Member Dive Session: £12.50
Group Dive (6 Plus): £10.00
Contract Group: POA

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posted : October 17, 2019

The Rez also has some of the best facilities of any inland diving site. We have male, female and disabled changing rooms, and a purpose built training room upstairs, which is available for hire. There is an on-site club with kitchen, and a bar/clubhouse. You will be hard pushed to find a better welcome than with Dudley Dolphin. They are a great bunch of people.

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posted : October 17, 2019

Dudley Dolphin BSAC are based here Sundays 8-12 Its a fab club, and a great site to dive if you are not put off by the dark and the cold. Our training mantra to our divers is "If you can dive here, you can dive anywhere" as it is a great opener for all sorts of diving. We actively encourage visiting divers from all agencies. If you want to know more, go to

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posted : February 12, 2015

This is the old 'training versus experience' debate. You can inflate your flotation and breathe in the air space for sure so that far it's safer than being in a cave but let's ask if your lights failed (you do have at least two on you don't you?) could you find your way out - probably. Your helmet might take a few knocks along the way though (you are wearing a helmet in an overhead environment aren't you?). Not being clever here just showing the different levels of training and diving required. I'd go with an experienced overhead/cave/night diver if possible. If you can't do that make sure you have AT LEAST two lights with fresh good quality batteries.

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posted : April 12, 2011

where abouts is this dive site,address

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posted : June 28, 2008

Would this dive be suitable for two qualified Advanced Open Water divers but with limited experience? Do I really need to do night diver training first or can we just go with torches and have a dive?

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posted : April 27, 2008

visited last year, small,but had a great day,good for night training, and search and recovery, one of our team over come the phobia of diving in the dark here. would reccommend this for anyone..

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posted : March 29, 2008

good fun day out, its not deep at all but a change for sure, and martin who run's it really makes you welcome. i posted some pics here

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posted : September 27, 2007

hayz only just passing my tests now but am loving it looking at the pics at the top looks an sounds gd love to dive it

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-- Daz --
posted : December 13, 2006

Dived here earlier in the year, a group of us from Newman Sport Divers did Boney's trail and all had a great day. We will be returning in '07.

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