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Old 09-07-2017, 10:52 AM   #207
Great Supremacy Member
Join Date: Jun 2001
Posts: 55,710
you can request for water quality test from water taken from your tap.
You probably can email/request it, not sure if they will do it or not though. You may also do your own private testing (soluble lead) on your own via a private lab.

But lets assume that the request to test for soluble lead can be granted.....but note, that is only for 1 instance at that point in time. That particular NUS research that i posted was testing for 480+ days.
So is that useful data esp if it turns out to be right at around WHO's limit?

But seriously even if it comes up to be 20ppm due to you doing an acid test and specifically used overnight standing water from the faucet, so what..... it's not under PUB's purview that they be responsible for what your contractor used or what someone unknowingly buys from Taobao or unapproved normal brass fittings from your local mama shop anyway. It's really not their problem or responsibility, is it? Doesn't take a genius to figure that out.

If you had taken time to read the NUS research which has already been done (recently) over a very long period of time, you'd know that the data is worth much more than the typical 1 or even few times testing that generally could be done.

Reposting summary again of the NUS research with specifically lead-free brass fittings that was done over a long period of > 1 year (not normal brass) :

2.1. Simulated Premise Plumbing System
To determine whether lead contamination in drinking water will occur in a “lead-free” premise plumbing system, a typical premise system was built using locally (Singapore) purchased materials as shown in Figure 1.
In Singapore, all water fittings used shall conform with the standards and requirements stipulated by the Public Utilities Board (PUB) and their use shall conform to the Public Utilities (Water Supply) Regulations and Singapore Standard Code of Practice (CP) 48. A water fitting shall be deemed to comply with the stipulated standards if it is certified by an accredited product certification body. The maximum allowable concentrations of metals leached shall not exceed the limits specified by the WHO Guidelines for Drinking Water Quality [28,29]. Copper pipes and brass fittings used in this study were microwave-digested and measured for lead content, and results showed that their lead content was <0.25% by weight, and thus can be considered “lead-free” according to the last “lead-free” definition by USEPA.

Residents moving into new buildings or renovating their plumbing systems are potentially at risk of lead contamination in their drinking water. Lead contamination due to the presence of a lead source is expected to persist for as long as many years if the situation is left untreated or the system is left untouched.

“Lead-free” brass fittings were identified as the source of lead contamination.

The system was assembled in the laboratory using all-new plumbing materials
and only certified copper pipes, brass fittings and stainless steel taps were used without any tapes, sealants and solders that may be present in field sampling. Many studies in the literature used either relatively short lengths of pipe (3 m) or single fittings to represent real distribution systems, while this study is specifically designed to represent real premise plumbing systems that use copper pipes.

The long experimental period allows us to show that lead contamination can be persistent in premise distribution systems and helps to fill the knowledge gap in the existing literature.

Acknowledgments: The authors thank the Singapore Ministry of Education (project number R-302-000-049-112) and National Taiwan University (grant number NTUCDP-103R7877) for financial support.
Author Contributions: Yi-Pin Lin and Ding-Quan Ng conceived and designed the experiments
1-hr ug/m3 + PSI

Last edited by WussRedXLi; 09-07-2017 at 11:47 AM..
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