Changing underwater bulb - unscrewing issue

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Eddles
Pool Care Proficient
Pool Care Proficient
Posts: 40
Joined: Mon 10 Jun, 2019 16:09
My Pool: 66000 litre indoor swimming pool with UV and sand filtration, and 1200 litre hot tub.

Changing underwater bulb - unscrewing issue

Postby Eddles » Wed 14 Jul, 2021 17:00

Hi all, my swimming pool has two lamps - I believe Certikin PU9s - and both bulbs had blown. I brought 2 replacement LED bulbs. I successfully replaced the bulb on one side, it works great. The other side, however, I couldn't undo one screw. I could remove the upper screw, but not the lower screw. I believe that due to my ham-fisted efforts and lack of leverage, I've now stripped the head despite using the exact correct bit, I double checked the fit with the screw I removed, it was perfect.

How do I remove the final screw? I've already brought replacement screws but need this one removed. I'd have used my battery impact driver but the warranty doesn't cover water damage. I saw a mention online that I could use air tools but I can't justify buying the compressor and drill needed, just for this one screw, and don't want to risk ruining hire tools.

Any advice would be much appreciated!

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Denniswiseman
Pool Industry Leader
Pool Industry Leader
Posts: 2077
Joined: Tue 06 Sep, 2011 05:48
My Pool: 10k inground fibreglass, Telescopic Cover, Hayward Powerline pump, Quality filter with glass media, 27kw output heat pump, K-2006C test kit
Location: United Kingdom

Re: Changing underwater bulb - unscrewing issue

Postby Denniswiseman » Thu 15 Jul, 2021 01:44

I'm afraid that you will have to drain it down sufficently to use your battery drill

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