If you need long-term maintenance of industrial plumbing https://pomplumbing.ca/industrial-plumbing/, then it would be most logical to conclude an agreement with a reliable company and delegate this task to it. I can recommend POM Plumbing Inc - we have been cooperating with this company for a long time and in all this time it has never let us down. As for the cost for their work, it is average, but we did not look for the cheapest services - they are rarely of high quality.