New oil boiler installation

Ace135

Hi there 
I am having a new oil central heating boiler installed tomorrow. I noticed they are going to do a chemical treatment of the primary water system for corrosion. I wondered if anyone knows about this and is it safe from a human and canine 🐶health point of view? It is a Worcester Bosch registered engineer who is doing the work. I will try to find out what chemical is used. 
I was offered a Combimate but I am unsure what it does and whether it is safe health wise too.
Any advice much appreciated as the work starts tomorrow.
Thanks very much 

comeandgo

I take it it’s the water in the heating system that is chemical treated and not your drinking water?

ThisIsWeird

The 'primary' system is isolated from any water you will make any physical contact with - unless you bleed a radiator, for example. Even then, it's hardly hazardous.

Nothing to worry about. Corrosion 'inhibitor' is a requirement for CH systems, and everyone has it added - except those with rusting rads...

Rodders53

comeandgo said:

I take it it’s the water in the heating system that is chemical treated and not your drinking water?

Nope.  See https://www.combimate.co.uk/ 

Does get fitted to the potable water supply. Supposedly safe.   Also needs regular replenishment of the chemical.  But IMHO it's akin to snake oil. 

If you want softened water to prevent limescale then fit a proper water softener.

The OP can read all about the Combimate and how its supposed to work from the makers website.

FreeBear

Rodders53 said: If you want softened water to prevent limescale then fit a proper water softener.

I'm in a hard water area. Removed my DHW tank last year and cut it open. Fully expected it to be caked in scale after ~35 years of use, yet found very little. The main reason for this was water temperature - It rarely got heated to 60+°C (thermostat was set to around 50°C). Unlike the kettle which has to be descaled every six months or so..