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The joint restraint is typical for C900. However, one thing that should be checked is whether or not the joint restraints were used correctly for that particular diameter. As an example, when using Megalugs with C900, there is a spacer on the bolts that must be left in. When using IPS OD pipe...

Ok, so say for example I am using the Watts 2" that I link to in my previous post (you can see the spec sheet on that page)... I have my water source maintaining 75 psi..if I adjust the spring on the top to "set" the PRV to 50 psi...then the downstream pressure will be about 50 psi at low flows...

Thanks for your comments; you are both correct. Here are a bit more details: The system is already in use. The wells are VFD driven. The reason for the VFD control is another subject – I can give you details if you want. They can provide way more water than is required for the community...

Ok, I guess I didn’t even think of those options. Let me get this right…If I put a PRV after the filters, set the downstream pressure (with the PRV) to 70 psi, and set the water supply pressure to 100 psi, then the pressure drop would still vary across the filters as flow increased. With low...

I have a small community water system (approx 8,000 gpd). The water source is from VFD well pumps which maintain 70-80 psi throughout the community. The demand varies greatly, from 5 gpm to (unknown – the max capability of the well pumps is 350 gpm, although domestic peak demand is probably...

I've read paragraph 1.3 in NFPA 1142, which says that in some cases the AHJ may require an additional water supply, and Annex G could be used as a guide. When is Annex G really used? Why does Annex G exactly match the ISO recommendation for water suppies? If I wanted to recommend a water...

TM: I understand your point about the size of the building. I don't quite follow your calcs: I am looking at NFPA 13 Figure 11.2.3.1.5. In your first example (1 million sq ft office with 10' ceilings and only figure a calculated area of 0.10 gpm / sq ft over the most demanding 900 sq ft...

Ok, I am trying to figure this stuff out too. Reading over the linked post, I found the following relevant paragraphs (slightly edited): [ul square] NTTT (Civil/Environme) 14 Nov 06 14:50 [ul circle] Water used to extinguish fire in a sprinklered building consists of: 1. Fire...

Is there an easy way to summarize the differences between the NFPA 1 and the IFC?

Ok, basic questions I am trying to figure this out: There are two main codes for fire protection, the International Fire Code (by ICC) and the Unifrom Fire Code (NFPA 1). States and local AHJ's may select either one or their own to establish law. I know this is a basic idea, but I am...

thewellguy: In our small municiple systems, we'd usually have two pumps operate on pressure switches with bladder tanks for storage. I am wondering if I can use the reduced size tanks afforded by VFD's, by using one VFD as a lead pump and another pump controlled regularly. Steve: Say my usual...

Related to this thread- Can I use a VFD set at 60 psi, and a backup well (set to cut in at 50 psi, and shut off at 70 psi) on the same system?

Municipal. Thanks.

Thanks for replying - I think I put this question in the wrong forum. We probably will add Cl and F. In the past, we have used diaphragm or peristaltic pumps for chemical addition. I think LMI and Stenner both have VFD-type pumps available to match flowrate, but do you have experience...

Sorry - to better answer your question: as you say, the course I linked to is an "awareness" course. It probably won't give you the info about UFC 04-010-01 that you want.

Military members and families are required to take the Level 1 course. On that site, you can take it online. It is free.

www.at-awareness.org The "Level 1" training should be adequate.

The hardness is about 175 mg/L. I have heard "horror stories" of stripping media from mis-feeding permanganate, so I thought (mistakenly?) that a softener would be easier to use. Your advice helps alot. What options are available with greensand that make the permanganate addition easiest? Up...

Can a water softener remove iron?

Current iron level is .6 ppm, manganese is .06 ppm. Peak demand is 50 gpm. What is the best (most affordable, low maintenance, simple operation) way to remove the to get it less than .3?