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

HSY water and sewer pipelines located on a property

If there is an HSY water pipeline, wastewater sewer or storm water sewer in the area affected by the building project (on a case-by-case basis, within a range of 2.5 to 10 meters), make sure that the construction does not damage them. Before the construction work can begin, the parties to the construction project must make plans for how the pipelines are moved or arranged in cooperation with HSY, and if necessary, submit them for approval also to the unit responsible for construction activities in the property's home municipality.

Even if there is no need to move the pipelines, the developer must draw up adequate geotechnical, structural or other specific plans, paying particular attention to

the prevention of damage to the water or sewer pipelines and the result of that damage
ensuring that the work does not compromise safety or cause harm or disruption to the water supply or the environment.

Water services planning and implementation must be carried out by qualified persons approved by HSY for municipal engineering and water services.

It is good to reserve about 1–2 years time for planning, depending on the scope of the project and the complexity of the work on water services. Contact HSY's water services immediately when project planning starts and ask for the person responsible for real estate-based pipeline relocation. You must always agree in advance with HSY's contact person to start relocation or protection planning for water services and structures.

The project parties must agree on execution and schedule with HSY. Work which affects water services is not allowed to begin before the plans are approved by HSY. If necessary, a separate agreement will be drawn up for the project.

Pipeline relocation or water supply system changes and the construction project must meet the following conditions:

The project parties are responsible for all the costs of the work, procurement and organization of the relocation and protection of the water and sewer pipelines. Work and procurement limits must be agreed separately with HSY.
The project developer / main contractor / chief designer will be responsible for the correctness and compatibility of the respective HSY pipeline relocation plans and other construction plans in accordance with their mutual contractual relations.
The review of the plan or the request for a change by HSY would not transfer any part of the responsibility to HSY, but the project parties are responsible for the content of the plan.
The construction project and the pipelines to be relocated must be designed and implemented in such a way that it is not detrimental to the subsequent maintenance and repair of the pipelines.
Unless otherwise agreed, the project parties will be responsible for the preparation of applications for easements or siting permits, as appropriate.
The agreed works and materials of HSY must be ordered in writing from HSY. Sufficient time should be reserved for HSY to carry out its procurement and installation required for the pipeline relocation or arrangement. HSY is not responsible for any delays in material deliveries due to suppliers.
The project parties should contact the supervisor assigned by HSY in good time before the work begins on the project in question and agree on the timetable for work and the necessary arrangements and precautionary measures. The work must not be started before these issues have been agreed.
The project parties will be responsible for the post-measurement of the water pipelines and sewers to be constructed in a manner approved by HSY, unless otherwise agreed.
The project parties are liable for any detriment or damage caused by the work, site arrangements or phases of work to the HSY pipelines, work site or third party.
HSY is not responsible for any damage or inconvenience that the water or sewer pipelines that are within the construction project area may possibly cause for the construction project.

HSY will determine other possible conditions that should be met on a case-by-case basis.

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

HSY water and sewer pipelines located on a property

Pipeline relocation or water supply system changes and the construction project must meet the following conditions:

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