The person who sold the water filtration system was recommended to us by the lady who sold the pump. The lady is the big boss of the hardware store near the main traffic lights in town. My wife telephoned the 'filter-man' and he came around to see us at the house. I understand his business premises are on the Chom Pra road, about the 10 kilometer marker, we had no need to visit him. My wife had a good rapport with both of these individuals. The borehole and pump were installed on Monday and the 'filter-man' was booked to start work today (Tuesday). His team of 4 arrived shortly after 08.00 and got to work to set up the installation. This involved moving the Hitachi water pump from it's old location and plumbing in the Mitsan DP-301 well pump too. The installation included wiring in both pumps and all the connections for the water filters, storage tank and pumps. Later in the morning my wife decided to add the second filter (resin for calcium) to the system and later still the RO unit in the kitchen. Notwithstanding the lateness of the secondary orders the installation team were very responsive to the change of plans and very good natured too. They finished the outside work around 13.00 before starting on the RO system for the kitchen. This was finished by about 14.30.
Both of the main filters, the carbon/magnesium and the resin, are forecast to last for 2 and 1/2 years before they need to have the filter material changed. Both require a 'back-wash' routine once a week to keep them in good working order. This is a relatively simple task to perform. The RO system needs the 1st of the 3 filters cleaned every 3 to 5 days. The full installation is covered by a 12-month warranty and the business is very happy to provide follow-on, on-call support services as necessary. We did not ask about the cost to replenish the filter materials though I would expect somewhere in the order of 2,000 baht per main filter.
The cost of installation for the whole system was included in the price quoted for the main filters and RO. That is, 14,000 for each of the main filters and 8,000 for the RO unit - a total of 36,000 baht. That included the supply of all pipes and fittings, the plumbing and electrical work. The team worked well, professionally and were friendly too. I did cost comparisons with two other businesses and I would say their price was very competitive. I have no hesitation in recommending them to anyone on this forum. My wife does have names and telephone numbers that she will be pleased to pass on.
@Jeppe, you are most welcome to visit on your next trip home, as is your partner if she would like to get the job done sooner.