The pipe sleeves seam should always face down and it should be secured about every foot to prevent the sleeve from moving. Insulating your hot water pipes reduces heat loss and can raise water temperature 2F4F hotter than uninsulated pipes can deliver allowing you to lower your water temperature setting. Pex Manifold With Insulation That means you wont have to wait as long for your water to get hot and youll be conserving water and energy while saving money. Insulating hot water pipes . An insulation blanket is a multi-layered cover that is wrapped around the hot water heater and controls the heat loss. The cold water side may condensate in the summer months contributing to damp crawl space conditions. You also wont have to wait as long for hot water when you turn on. Insulating the hot water pipes leading out of your water heater for example can reduce heat loss and lower the costs of heating the water. A great solution is to insulate your pipes to reduce heat loss and ra...