GOC2144129-CT - Legionella - Remove Dead Legs, Install Recirc Sys, and Add Chlor

Scope of Work/Overview:

1. Remove dead legs in the piping system that result in stagnate water in the system.
2. Reinsulate any exposed piping that results in hot piping losing its heat, and cold piping from absorbing heat so that temperature conditions do not become favourable for legionella bacteria growth.
3. Provide new hot water recirculation branches to branch lines longer than 10m from main lines and extend existing ones that are currently greater than 10m.
4. Replace existing globe style balancing valves with adjustable thermal balancing valves that are capable of high temperature bypass disinfection and provide this type of valve on any new recirculation system branches.
5. Provide backflow protection on cooling water feed to AC units.
6. Provide a chemical metering pump and solution tank at the water entrance to allow disinfecting chemical to be easily injected into the domestic piping system to allow for shock treatment should a bacteria event occur.
7. If hot work is being performed and building fire alarm needs to be shutdown, this work will have to done after hours.
8. All cutting, drilling and scanning will be the responsibility of the contractor.