I just to advised if possible do not use ABS water pipe.Instead please use normal PVC pipe. For PVC pipe please ensure that your contractor using Class 6 and 7.The ABS pipe is not resistance to acid, very easily 'makan' by acid.

House no need class 7 lar, pvc class e = pn15; can stand 15 bar. household with pressure booster pump normally 40psi=3bar only

Seem like the best for the money is poly (PB). Cheaper than stainless steel, flexible and screw type joint which is secure. But chemical and corrosion any problem for underground?

I have 2 water tank and all my bathroom is connect to the tank. So the water is always moving and no statik. While the kitchen and the garden is main.

It is dark. will do tomorrow

I m using this kind filter case but not the same filter material as your 1. The filter you using is something like rough sand surface. I use before and not that effective in filtering rust brown water. And very fast clog.

I change to those string line type which have better filtering. And have better flow .

Im using poly from main to tank and abs from tank to toilets. Since poly fittings is damn huge and you wont have proper way to conceal poly fittings inside the wall ...

Go buy one foot ABS pipe and one ABS socket joint and buy one bottle acid from hardware shop. Pour the concentrated acid onto them and see if it melt. Why buy 2? What is the point of having ABS pipe that is acid resistance and yet the joints are not. So be awared.

guys, i'm going to make some DIY work on my house...planning to buy a PN15, class E, 50mm pipe..i know it comes in 6 meters long, what is the current market price for the pipe?

ABS Pipe
ABS pipe and fittings are made from a thermoplastic resin called Acrylonitrile-Butadiene-Styrene (ABS for short).
ABS PIPING SYSTEMS: - Are easier and less expensive to install than metal piping; Feature superior flow due to smooth interiorfinish; Do not rot, rust, corrode or collect waste; Withstand earth loads and shipping (with properhandling); Resist mechanical damage, even at low temperatures; Perform at an operational temperature range of -40°F to 180°F; Are lightweight (one person can load and unload); Take less time to rough in than metal DWV materials.
ABS pipe and fittings were originally developed in the early 1950s for use in oil fields and the chemical industry. In 1959, John F. Long, a prominent Arizona builder, used ABS pipe in an experimental residence. Twenty-five years later, an independent research firm dug up and analyzed a section of the drain pipe. The result: no evidence of rot, rust or corrosion.

CPVC Pipe
CPVC Pipe - For Superior Corrosion Resistance in High Temperature Applications
Harvel CPVC pipe is produced from a specialty blend of Corzan® CPVC material with unique physical properties desirable for piping applications (i.e., improved impact resistance and good fire resistance capabilities).
The CPVC product line includes schedules 40 and 80 piping from 1/4" through 16" diameters. Harvel CPVC piping systems can handle more than three-fourths of the temperature/pressure requirements of today's typical process plants. CPVC pressure pipe has an upper working temperature limit of 200°F (93°C), or approximately 60°F (15°C) above that of Type I Grade I PVC. As with all thermoplastic piping systems, CPVC's ability to withstand pressure varies with pipe diameter, wall thickness, and temperature. For pressure piping applications it is recommended for temperatures as high as 200°F (93°C) when appropriate temperature de-rating factors are applied. As the pipe diameter and temperature increases, the pressure rating of the product decreases. For example, 1/2" Schedule 80 CPVC pipe is engineered for continuous service of 850 psi @ 73°F (23°C). The same pipe in service @ 180°F (82°C) carries a maximum working pressure rating of 210 psi at this temperature. 6" Schedule 80 CPVC pipe is designed for 270 psi @ 73°F, and 54 psi @ 200°F.

PVC Pipes & Fittings
PVC Pipes from Professional Plastics offer superior quality for a wide range of applications
Professional Plastics is an authorized distributor of premium Harvel brand PVC Pipe. Harvel uses its own custom blend of PVC compound to ensure that desirable physical properties are maintained with every production run. Harvel PVC piping exhibits exceptional consistent quality with uniform properties; making it the preferred choice of fabricators and custom houses. Harvel's product line has grown to include standard and custom extrusions of PVC pipe in schedules 40, 80, and 120; as well as SDR series pipe produced to 13.5, 21, 26 and 41 dimensions.
In addition to a full range of sizes, Harvel also offers various options including: belled end, gasketed, roll grooved, and threaded pipe ends, as well as custom dimensions and lengths. Harvel PVC pipe is ideal for numerous applications including chemical processing, high purity applications, water and waste water treatment, potable water systems, agricultural, irrigation, plating, and many other industrial applications involving corrosive fluid transfer.
For Higher Temperature requirements, Consider CPVC Pipe

just create flikr account..upload my master room toilet..

i upload my master toilet before and after..all using ABS..just waiting ..for how long the ABS will leak...

i put Stainless steel socket to 1/2 inches...ya...SS need more white tape...one toilet kena already..after completed tiles, then leak..the tile had to break to tighthen the socket..i use ABS size 3/4 inches then used socket 1/2 inches

my design is like this...a bit difficult to explain...
from meter 1 1/4 inches pipe then branch out into 2 branches...i branch to water tank old house, other to water tank new house..each branch is 1 inches..in this way i do lose water volume when both to water tank at new and old house at simulatenously...

and i do not use pump...so far my toilet..water volume and pressure good...

Poly the bulky thing is not cheap either. GI you should forget about it unless you still want to live in caves (just joking). Of course when we do something we have to see what it is use for and decide what material is best for it. It is not ss, ss, ss like that. You should advise your hardware shop to get these for his customers lor what to do, everybody has to be alerted to progress. You help him he help you.

No la you mistaken. No, not using SS fittings. it use copper fittings. The "old" SS pipe is thick and expensive because it uses SS fittings that you have to make the pipe end with thread like GI pipe. to do that thread it has to be thick otherwise it will be too thin to take the pressure/weight of the compress fittings. Now with this thin ss, it has to use copper fittings. You see someone discovered why not use thin ss instead of expensive copper pipe by using copper ring compression fittings. Small idea great invention/discovery.