Dave Plowman (News) wrote:
In article ,
Tony wrote:

What sort of maintenance does a whole house UV treatment unit need? This
is the type that comprises a sealed stainless steel tube about 1.5m long
within which there is UV fluorescent light? Does the UV light need to be
replaced regularly (in fact, short of doing a water quality test, I
guess I don't know that it is actually working!)


Assuming it's a fluorescent tube, these have a life of about 3000 hours -
although the efficiency drops off somewhat before they actually fail
totally. Isn't there some form of inspection window?

No, its totally sealed.

What's this device for? Can't see the sort of concentrations of UV you'd
get with this having much effect on flowing water.

Its for whole house water purification - water comes in from a borehole
via a header tank up the hillside, through a sediment filter, through
the UV unit and then in to the domestic system. The installation was
put in just before we bought the house last year because the statutory
water test the council do failed (before then there'd been no
treatment). I don't know who put the unit in.

It sounds like you and Grunff don't think its up to much??