Great product once installed, would be rated 5-star but for a a couple minor niggles. The top access cover is only 95mm which makes it almost imposible to reach inside to install back-nuts unless you have very thin arms, and the hatch is not places centrally so you can only just reach one side not the other. As a result you must use push-fit connectors. I would suggest a larger inspection hatch at least 300mm. Also, instructions supplied are very scant, so not for the novice installer.
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