Marathon Roofing Products - Poseidon SS Retrofit Drain - With Proseal - Standard Hardware

The Marathon Poseidon SS Retrofit Roof Drain series (BSS3P, BSS4P, BSS5P, BSS6P) offers all-stainless steel construction suited for retrofit installations in demanding environments. Each model features a 16-gauge Type 304 stainless steel body, a #316 stainless clamping ring and strainer, and comes with a ProSeal rubber seal to help prevent backup. Standard across all sizes are a 16-inch diameter flange and a 12-inch outlet, with optional coatings and hardware to match diverse application needs.

Key Features:

• Comes in four outlet sizes: 3″, 4″, 5″, 6″ (SKUs BSS3P-BSS6P)
• Body made from 16-gauge Type 304 stainless steel
• #316 stainless steel clamping ring and strainer included
• ProSeal rubber seal supplied to prevent water backup issues
• Uniform flange diameter (16″) and outlet length (12″) across all sizes

• Body material: 16-gauge Type 304 stainless steel
• Ring and strainer material: #316 stainless steel
• Flange diameter: 16″
• Drain outlet length: 12″
• Sizes available: 3″, 4″, 5″, 6″
• Seal type: ProSeal rubber seal supplied

• Identify required size (3″, 4″, 5″, or 6″) matching the existing drain pipe.
• Remove or clean the existing drain cover and ensure the area around the current drain is free of debris.
• Place the Poseidon SS retrofit drain so the 16-inch flange lies flat on the roof membrane and align with outlet pipe.
• Install the ProSeal rubber seal as directed by the vendor.
• Attach the #316 clamping ring and strainer securely using bolts.
• If needed, apply optional PVC or TPO coating to flange for hot-weld or membrane compatibility.

Q: What does “BSS3P”, “BSS4P”, etc., signify?
A: These SKUs correspond to the Poseidon SS Retrofit Drain with ProSeal seal, in 3″, 4″, 5″, or 6″ outlet sizes respectively.

Q: What materials are used in the construction?
A: Body is Type 304 stainless steel (16-gauge); ring and strainer are Type 316 stainless steel; seal is ProSeal rubber.

Q: What are the standard flange and outlet dimensions?
A: Flange is 16″ in diameter; outlet length is 12″ for all sizes.

Q: Is this product suitable for coastal or harsh environments?
A: Yes, stainless steel construction (304 body, 316 ring/strainer) and corrosion-resistant materials make it suitable for such conditions.

Q: Are there optional coatings or accessories?
A: Yes — PVC or TPO coatings for the flange, optional security hardware for the strainer.