M
Mike Jackson
Well I used the Calshot Cleaner yesterday. It had been in the van for quite a few days so was nice and cold when I took it in. The calshot comes in a concertina type bottle that you squeeze to get the contents out. It is supplied with a threaded spigot and a plastic 1/2" FI connector. The spigot has a check valve fitted. The idea is to screw the connector onto the threaded spigot and then screw the whole thing onto the filling valve on the heating system. This was where I cam slightly unstuck, The filling point was pointing upwards under the boiler and there wasn't room to screw the calshot on. Not to be defeated I used a straight coupling to adapt the thread to 1/2 MI so that I could connect the bottle to the filling loop. It wasn't possible to connect the bottle straight to the filling loop as the end of the thread was flat.
The instruction state that the pressure should be dropped on the system before the cleaner was injected but I decided to see if I could force the cleaner in with the system under pressure. No go, I had to lower the pressure so that I could squeeze the cleaner in. This is a distinct disadvantage over products like the fernox express range etc. which will go in under pressure although the calshot does retail at a lower price.
When I stopped squeezing the container it started to refill from the heating system so I had to squeeze the cleaner back in and shut off the isolating valve quickly. This was a bit awkward as I had to use both hands to squeeze the container because I was connected to the filling loop rather than the rigid valve. The check valve is obviously not that effective.
In all not a bad product, not as easy as the aerosol type products to inject into a system but does the trick at a lower price.
In all honesty it's not something that I would look to buy myself as I have made an injection pump from a garden sprayer that enables me to inject the normal chemicals in under pressure without having to pay the premium price of an aerosol product.
For someone that only uses CH chemicals very rarely it's not a bad product but for someone doing it on a regular basis it's a bit too much faffing about. Strikes me as more of a DIY product if I'm honest.
The instruction state that the pressure should be dropped on the system before the cleaner was injected but I decided to see if I could force the cleaner in with the system under pressure. No go, I had to lower the pressure so that I could squeeze the cleaner in. This is a distinct disadvantage over products like the fernox express range etc. which will go in under pressure although the calshot does retail at a lower price.
When I stopped squeezing the container it started to refill from the heating system so I had to squeeze the cleaner back in and shut off the isolating valve quickly. This was a bit awkward as I had to use both hands to squeeze the container because I was connected to the filling loop rather than the rigid valve. The check valve is obviously not that effective.
In all not a bad product, not as easy as the aerosol type products to inject into a system but does the trick at a lower price.
In all honesty it's not something that I would look to buy myself as I have made an injection pump from a garden sprayer that enables me to inject the normal chemicals in under pressure without having to pay the premium price of an aerosol product.
For someone that only uses CH chemicals very rarely it's not a bad product but for someone doing it on a regular basis it's a bit too much faffing about. Strikes me as more of a DIY product if I'm honest.