Water Meter Testing

Increase the reliability of your water meters by using our expertise in mechanical and durability testing techniques to detect design flaws in your water meters early. We carry out mechanical testing under controlled conditions according to IS 779:1994 / ISO 4064 (Class B) standards.

Water meters play a vital role in measuring the amount of water used by residential and commercial buildings connected to a public water supply system. They help utilities manage demand, ensure fair billing, detect leaks, and understand consumer water usage patterns.

There are two main types of water meters: inferential-type and volumetric. Inferential-type meters use the velocity of water to measure flow, while volumetric meters directly measure the volume of water passing through.

Mechanical water meters, over time can lose accuracy due to various factors like wear, water quality, and high velocity. Sudden pressure changes can also cause damage to water meters. We help water meter manufacturers sustain maintain accuracy, quality assurance measures and flow testing standards and comply with national and international standards.

Validity of Life Test Report(s):

LTR Validity period for Domestic Water Meter 15mm to 50mm is 3 years from date of issuing the test report and for Bulk Water Meter 50mm to 200mm 5 years from date of issuing the test report.

Acceptance Criteria:

During the sampling period, the test samples are drawn from each lot based on random sampling techniques. The lot size, number of samples drawn for first sample, second sample and corresponding acceptance criteria are followed as per IS 779: 1994 standard and is given in the following table.

Size of the Lot	Size of the First Sample	Acceptance Number	Rejection Number	Size of the Second Sample	Size of the Cumulative Sample	Cumulative Acceptance Number
Up to 50	5	0	1	–	–	–
51 – 150	13	0	2	13	26	1
151 – 280	20	0	3	20	40	3
281 – 500	32	1	3	32	64	4
501 – 1200	50	2	5	50	100	6
1201- 3200	80	3	6	80	160	9
3201 -10000	125	5	9	125	250	12
10001 -35000	200	7	11	200	400	18
35001 and Over	315	11	16	315	630	26

Benefits for BUYERS in the Bid Package:

Easily select the water meter brand based on eligibility criteria.

Save time and money by avoiding further Life Tests.

Ensure that the procurement brand of LTR is approved by NABL / BIS lab.

No need for a separate life test for every bid within the validity period of the tested Water meter in LTR.

Avoid expense for conducting repeat samples from the same manufacturing lot.

Benefits for MANUFACTURERS:

Many Water Utilities require a Life Test / Endurance Test Report for Water Meter from NABL / BIS approved lab as pre-qualification in their bid package.

SITARC is a NABL approved facility for carrying out mechanical testing of water meters and our LTR is an authorized certificate enabling manufacturers to guarantee the performance of their water meters.

LTR’s offered by SITARC for approved samples is updated in the SITARC Website for easy reference.

The SITARC Test Certificate can be used to get BIS and ISI certificate for your water meter.

Water Meter Testing