Pete147
New Member
Hi all,
In order to keep sand and sediment out of my water lines I purchased a carbon steel Lakos Sandmaster which has worked really well. It was installed in March and I already have rust forming on the surface of the unit as well as at the in and out connections.
The Sandmaster typically has condensation on the surface of it from the cold well water running through it. I spoke to an engineer at Lakos and he said that the unit is considered defective since it should not be corroding like within only a few months. His conclusion is that likely there is electrolysis occurring due to two unlike metals touching in combination with the water, causing a current between them. Is it because of the fitting where the bottom pressure gauge is attached to is a different metal than the carbon steel Sandmaster causing the electrolysis and hence the corrosion? Same with the fitting at the top of the unit? Are those brass? I didn't purchase the parts.
I have a replacement Sandmaster coming in the mail however I want to make sure when I install the replacement that the corrosion does not occur again.
Should I use a a dielectric union? I know there is a lot of debate regarding these. Please let me know your thoughts. I've included a picture. I wish I had purchased the stainless steel model, unfortunately it's more expensive.
In order to keep sand and sediment out of my water lines I purchased a carbon steel Lakos Sandmaster which has worked really well. It was installed in March and I already have rust forming on the surface of the unit as well as at the in and out connections.
The Sandmaster typically has condensation on the surface of it from the cold well water running through it. I spoke to an engineer at Lakos and he said that the unit is considered defective since it should not be corroding like within only a few months. His conclusion is that likely there is electrolysis occurring due to two unlike metals touching in combination with the water, causing a current between them. Is it because of the fitting where the bottom pressure gauge is attached to is a different metal than the carbon steel Sandmaster causing the electrolysis and hence the corrosion? Same with the fitting at the top of the unit? Are those brass? I didn't purchase the parts.
I have a replacement Sandmaster coming in the mail however I want to make sure when I install the replacement that the corrosion does not occur again.
Should I use a a dielectric union? I know there is a lot of debate regarding these. Please let me know your thoughts. I've included a picture. I wish I had purchased the stainless steel model, unfortunately it's more expensive.