I think that due to the poor condition of the valve, is it logical? You probably shouldn't trust the installation of such bad valves to dubious companies. It is better to pay once for a really decent job. See what
https://www.pomwaterproofing.ca/back-water-valve-installation/ [pomwaterproofing.ca] has to offer - they are masters of their craft. I also like the fact that thanks to them you always get timely results. In addition, you can call the master even on a holiday, which is especially important in Canada.