Quote from: Andrew4444 on February 24, 2026, 07:20:23 pm

Thanks.  I will check.

I'm in st.ives but cambs one not cornwall.

Near huntingdon

I'm on the north west edge of Bristol and get supplied by Bristol Water. They use Chew Valley reservoirs in North Somerset AND draw off water from the Sharpness Canal in Gloucestershire which is fed by the River Severn.

I find after a lot of rain my tds DROPS. I've been window cleaning WFP from here since 2005 and the pattern is as follows -

After a lot of rainy days Input TDS250/300 output 4-6ppm. After a dry spell, Input TDS 350 plus output 7-9ppm.

I use an old Merlin type PRF R/O with the uprated membranes.

We used to do a bit of work in Bristol and the reading was 450-475

Thanks.  I will check.

I'm in st.ives but cambs one not cornwall.

Near huntingdon

I'm on the north west edge of Bristol and get supplied by Bristol Water. They use Chew Valley reservoirs in North Somerset AND draw off water from the Sharpness Canal in Gloucestershire which is fed by the River Severn.

I find after a lot of rain my tds DROPS. I've been window cleaning WFP from here since 2005 and the pattern is as follows -

After a lot of rainy days Input TDS250/300 output 4-6ppm. After a dry spell, Input TDS 350 plus output 7-9ppm.

I use an old Merlin type PRF R/O with the uprated membranes.

Your water company may have changed where they get your water from.

My water used to be 050 but jumped to 350. The water company changed the supply from surface water (a reservoir) to ground water (boreholes). I’d check with your water company.

Where in the country are you?

Ive been full time 10 years,  almost 12years since I first made a trolley out of a barell, some sack wheels i found, a 10 quid chinese pump off ebay and some pond hose from b&q. My first pole was a Harris pole with a Tesco sweeping brush 

I started off on ladders part time in 1996.

In 2005 I bought a Fogwash system off of Peter Fogwill in Broxburn Edinburgh.

It was a trolley that took one or two 25 litre barrels and had a small battery and 60psi shurflo pump on board.

It had 40ft of aluminium Unger twist lock poles which was ok up to about 20ft but incredibly whippy beyond 30!

That sat in the back of my Volvo 240 estate with six 25L barrels.

I went to a couple when I first started and met some good people like Jeff Brimble and the great late Peter Fogwill. But as a well established business I don't have the time or desire to attend these days I think its the same for most but if your a new or up and coming business they're good for boosting your business profile.