Instructions for constructors

A construction project has many phases and cooperation partners. The building control departments of cities have the largest authority role. HSY counts you as a constructor, when you connect your property to the water services network and municipal waste management services.

Constructor’s check-list

Connection declaration

Order the statement of connection points from the connection services of HSY’s Water Services. You can order the statement electronically at www.hsy.fi/liitoskohtalausunto. The connection declaration defines the connection points of service piping, their connection heights and the flood elevation heights of the sewers. Flood elevation height is the level the wastewater could reach in the network. Delivery of the statement may take up to several weeks.

Applying for a building permit

2. Apply for building permit from the building control department of your municipality. When you have received the permit, remember to also deliver the water and sewer plans of the property (so-called KVV plans) to the building control department and apply for an approval of the appointed KVV site manager.

In Espoo, deliver one copy of the water and sewer plans approved by the building control department (including water and sewer installations review, layout and floor plan for the water meter premises) to the customer service office of the HSY Espoo water services.

The Building Control Departments of Helsinki and Vantaa will deliver the copies of the plans to HSY.

Planning service piping

3. Service piping is dimensioned by the property’s water and sewer engineer. Each property should have a house-specific shut-off valve outside the house, in the immediate vicinity of the connection point.

HSY is not responsible for ensuring that the property's water and sewer plans can be implemented.

Requirements for the water meter premises

4. The water meter must be placed in a suitable place so that it is easy to install, read, maintain and re-place. It should be protected against freezing, heat and other harmful effects. (D1, Section 2.4.2)

Signing the connection and user agreements, connection fee

5. Order the connection and user agreement well in advance from your municipality’s connection services. The agreement’s delivery time could be up to two weeks. The prerequisites for making the agreement are that a legally binding building permit has been received and that the water supply works have already been constructed and commissioned in the property of the party ordering the connection.

The signatures of all property owners are required for the agreement. We will send out two copies of the agreement, and the party connecting to the network shall return both signed agreement copies to HSY.

After this, HSY will sign the contracts and send a copy of the contract back to the connecting party with a connection invoice.

Property’s connection data delivered to HSY

6. Deliver to HSY the following

water and sewer installations review
site plan for water and sewer systems
the water and sewer plans of the property concerning the service piping and the water meter.

If the planned connection work requires installing service piping at other properties or if the connection is made to the service piping of another property, HUOM! POIS? the encumbrance agreements defined in section 1.2. (example as an attachment) and the agreement concerning the shared service piping also need to be delivered to HSY before the work is ordered.

Ordering connection work

7. Order the connection of the property to the water and sewer network from HSY first in writing with a connection work order form. After you have delivered the written order, request a call-back from the piping supervisor, who will agree on the time and date of the connection work with the supervisor of the water and sewer works.

The prerequisites for ordering connection work are

connection declaration
building permit
approved water and sewer plans (KVV plans)
KVV site manager approved by the building control authority
a signed connection agreement
a written order of connection work.

Construction of the service piping and connection to the property

8. The service piping should be installed to the connection point (presented in the connection declaration, usually made to a HSY water main located in the street). The party connecting to the network will pay for the procurement and installation of the service piping.

The orderer should ensure that the water pipe has tight protective plugs, which prevent impurities from entering the water pipes. The plugs must be kept in place up until the final installation. The orderer should also ensure that his or her contractor carries out all the water pipe works in a hygienic manner.

Only HSY has the right to carry out the connection and branching work of water pipes and the installation of water meter. Connection or branching works by other operators are not approved.

Connection work by HSY

9. HSY will carry out the connection work after the order at a separately agreed date.

Before the agreed date, the excavation must be completed so that it can be reviewed at midday on the weekday before the planned connection work, if necessary.

Connection work for water pipe

10. Service piping connection work by HSY comprises.

Connecting the service piping to the connection point defined in the connection declaration and the property’s connection information.

‭(Hidden)‬ Installing the valve to the service piping

Mapping the service piping and delivering the information to the appropriate city’s data system of underground cables.

HSY

Instructions for constructors

Constructor’s check-list

Connection declaration

Applying for a building permit

Planning service piping

Requirements for the water meter premises

Signing the connection and user agreements, connection fee

Property’s connection data delivered to HSY

Ordering connection work

Construction of the service piping and connection to the property

Connection work by HSY

Connection work for water pipe

‭(Hidden)‬ Installing the valve to the service piping

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‭(Hidden)‬ Content Editor ‭[2]‬

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Instructions for constructors

​Constructor’s check-list​​​​​​​​​​​​​​​​

Constructor’s check-list