Stichting Waternet has an open tender for the replacement of the ozonated water pumps at the Weesperkarspel drinking water production location. The current four pumps, installed in 1974 and driven by 15-year-old frequency converters (FO’s), are due for replacement. The FO’s have a normal service life of 15 years, are no longer available, and reliability has been seriously compromised, with two failures in the past year. There is no longer a possibility to repair the FO’s, making replacement in the short term necessary to ensure the continuity of the process step. The assignment concerns a works-type contract in which new pumps and associated FO’s must be installed, integrated with the existing softening reactors, and comply with water quality standards. The tender requires a technical design, installation, testing, and handover, with attention to energy efficiency, ease of maintenance, and compatibility with the current system.
Works · Open · National procedure
01What is being requested
Stichting Waternet has an open tender for the replacement of the ozonated water pumps at the Weesperkarspel drinking water production location. The current four pumps, installed in 1974 and driven by 15-year-old frequency converters (FO’s), are due for replacement. The FO’s have a normal service life of 15 years, are no longer available, and reliability has been seriously compromised, with two failures in the past year. There is no longer a possibility to repair the FO’s, making replacement in the short term necessary to ensure the continuity of the process step. The assignment concerns a works-type contract in which new pumps and associated FO’s must be installed, integrated with the existing softening reactors, and comply with water quality standards. The tender requires a technical design, installation, testing, and handover, with attention to energy efficiency, ease of maintenance, and compatibility with the current system.
At WPK, ozonated water is pumped from the ozone cellars to the softening reactors by 4 pumps. The current four pumps were installed in 1974 and are driven by electric motors. The current booster pumps with frequency converters (FO’s) of the ozone installation at the Weesperkarspel drinking water production location (hereinafter WPK) are approximately 15 years old. The normal service life for FO’s is 15 years, and therefore they are due for replacement. Furthermore, the reliability of this pump installation is a problem. Parts for the FO’s are no longer available, meaning they can no longer be
02Outcome
GMB Civiel BV
03Value in context
The contracting authority did not publish an estimated value — common for a large share of contracts. The EU threshold for werken is € 5,54 M, for reference.
04Bidders in this segment
05Tender documents
06Legal themes that may be relevant here
07Frequently asked questions
What is the reason for the replacement of the ozone pumps?
What is the specific technical necessity of this assignment?
What is the current situation of the pumps at the Weesperkarspel location?
Automatically compiled from the official tender data and documents.
08Estimated value versus the market
€ 1,4 mln
€ 3,6 mln
€ 9,1 mln
Gegunde waarden in CPV 45 · werken n=3159