A sewer collector is used where several branches need to merge into one serviceable main line. This is common in villas, larger houses, guest units and reconstructions where the kitchen, bathrooms and laundry must be gathered before the final outlet to the manhole or external drain line.
What “collector” means in this context
In domestic drainage, a collector usually means the node where several internal or external branches join one main sewer line. It is more than a simple tee: it is a planned grouping of connections with the right flow direction, service access and often a nearby inspection chamber.
When this layout is needed
- Villa with several bathrooms.
- House with a separate laundry and a kitchen far from the main outlet.
- Connecting a garden יחידת דיור.
- Rebuilding an older network where branches were joined chaotically.
- Preparing for future service. One clear service node is better than three hidden joints.
What matters in collector installation
- Correct entry sequence. Flows should not crash into each other.
- Maintaining fall on every branch.
- Accessibility. This node must not be buried without a clean-out or inspection chamber.
- Adequate main diameter. After merging, the line must carry the combined flow.
- Separation of sewage and storm water. They should not be mixed into one collector without a dedicated engineered solution.
What it costs
- Simple collector node inside the house — 800–2,500 ILS
- Collector in a service niche or shaft — 1,500–4,000 ILS
- Collector node in the yard with an inspection chamber — 3,000–8,000 ILS
FAQ
Is a collector the same as an ordinary tee fitting?
No. A tee is one fitting. A collector node is the place where several lines are merged into one serviceable system, with consideration for diameters, flows and maintenance access.
Where is it better to install the collector — inside or outside?
It depends on the layout. If the branches converge indoors, a service shaft is convenient. If it makes more sense to combine them before the external main, the yard may be better — but with an accessible inspection chamber.
Can the collector be hidden permanently behind tiles?
It should not be. These nodes must remain accessible for inspection and service, otherwise any future problem becomes a finishing-demolition job.