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Online Plumbing Supply Store

Go-Sep™, Experts In Water management!

+1 (609) 429 0430

Water management

Go-Sep™ is a manufacturing company and expert online plumbing supply store in the field of (waste) water management and water conduction. We are an American manufacturing company founded by European engineers that provide innovative water solutions. 

In our own factory in New Jersey we develop, manufacture and sell high-quality products for water management in construction-, plumbing- and installation industries. We are proud to guarantee the best quality of our products.

What we stand for

The mission of Go-Sep™ is to produce durable high-quality products that help protect the environment and society, sold from our online plumbing supply store. We strive to protect our water with an ultimate goal of creating a better and healthier tomorrow. Our products are based on European designs and have been in the market for 20+ years. 

For the production of our products we work with first class HDPE. This material is known for its durability, which is estimated to be over 50 years.  

Made in the USA

“At Go-Sep™ we work with exceptional quality materials and certified welders to guarantee first-class products”


HighTech Machining

To guarantee precision products

Certified Welders

To guarantee the best products

HDPE welding

First Class Materials

To guarantee the best quality

Our Featured Products

  • Flap valve gate flange
  • Sale! Flap valve gate spigot
  • Flap valve gate wall mount

The GGV Sluice gate series!

Quantity discount on the GGN model!

On Sale Products

  • Sale! Sewer flapper
  • Sale! Flap valve gate spigot


Product sheets

About us

Our Happy Customers!

I love working with Go-Sep products! High quality and durability and easy to install. Most of their products are customizable, which I love.
Burak Bayram
Great customer service and fast delivery. We had an grease trap with inspection pit installed and they work perfectly. The quality is great!
Juan Nano
The steel grease trap of one of my customers rotted away in no time! I replaced it with a Go-Sep one to make sure it will not happen again.
Kevin B.

HDPE flap valve GFV-W™ Wall mounted

HDPE flap valve GFV-T™ Wall mounted

HDPE flap valve GFV-P™ Pipe mounted

HDPE flap valve GFV-F™ Flange mounted

Sluice gate GGV-W™ - Wall mounted

Sluice gate GGV-N™ Wall mounted

Sluice gate GGV-R™ Wall mounted (Rectangular)

Hand gate GHG-W™ Wall mounted