Ask Me Help Desk - Repipe or reline pipes?

Quote:

Originally Posted by speedball1

Then you recommend copper over PVC or PVCV for water pipes? what about Pex?

Ordinarily I would recommend copper, but copper has become cost prohibitive, which means copper is out of the equation when the job is being done on a budget.

Dollar for dollar, CPVC and PEX are nearly interchangeable in material costs.

However, PEX has a considerably lower labor cost due to significantly less stringent installation requirements.

And when it comes to re-pipes where minimizing the amount of wall surfaces that need to be removed to create pipe chases or drops, fishing flexible PEX tubing through wall cavities wins, hands down.

Could someone please tell me which cpvc glue requires primer on the glue can label? Or which cpvc pipe manufacturer requires primer on their cpvc pipe?

Quote:

Originally Posted by doug238

could someone please tell me which cpvc glue requires primer on the glue can label? or which cpvc pipe manufacturer requires primer on their cpvc pipe?

It is my understanding that the Oatey orange CPVC cement is listed as a two stage cement requiring primer.

As for the manufacturers, most that I am aware of stipulate a single stage yellow cement.

IAPMO - Plumbing Research Directory
Excerpts
CHARACTERISTICS: CPVC Solvent cements are intended for use with listed CPVC pipe and fittings, and the one step CPVC Solvent cements are intended for use with listed 1/2 inch through 2 inch listed CPVC pipe and fittings;

MODELS:
*Gold Label – Lo-VOC 1-Step Flowguard Gold® Gold Medium Body CPVC Cement
*Yellow Label – Lo-VOC 1-Step All Weather Flowguard Gold® Yellow Medium Body CPVC Cement
Gray Label Industrial Grade Lo-VOC Heavy Duty Gray CPVC Cement
Orange Label CPVC Medium Body Cement
Orange Label CPVC Heavy Duty Cement
Orange Label Lo-VOC Orange Medium CPVC Cement
Orange Label Oatey 914 Heavy Body Orange CPVC Cement
United Elchem
UNI-WELD 3200 (Orange Label) Orange CPVC Solvent Cement (Medium Body Medium Set)
PLASTIC-WELD 603 (Orange Label) Orange CPVC Solvent Cement (Medium Body)

*Where Local Codes Permit, 1-Step Products may be used without Primer.

Quote:

Originally Posted by doug238

IAPMO - Plumbing Research Directory
exerpts
CHARACTERISTICS: CPVC Solvent cements are intended for use with listed CPVC pipe and fittings, and the one step CPVC Solvent cements are intended for use with listed 1/2 inch through 2 inch listed CPVC pipe and fittings;

MODELS:
*Gold Label – Lo-VOC 1-Step Flowguard Gold® Gold Medium Body CPVC Cement
*Yellow Label – Lo-VOC 1-Step All Weather Flowguard Gold® Yellow Medium Body CPVC Cement
Gray Label Industrial Grade Lo-VOC Heavy Duty Gray CPVC Cement
Orange Label CPVC Medium Body Cement
Orange Label CPVC Heavy Duty Cement
Orange Label Lo-VOC Orange Medium CPVC Cement
Orange Label Oatey 914 Heavy Body Orange CPVC Cement
United Elchem
UNI-WELD 3200 (Orange Label) Orange CPVC Solvent Cement (Medium Body Medium Set)
PLASTIC-WELD 603 (Orange Label) Orange CPVC Solvent Cement (Medium Body)

*Where Local Codes Permit, 1-Step Products may be used without Primer.

Right, but if you read the directions on a can of Oatey's orange cement (medium, heavy, low VOC etc) the assembly guidelines include applying primer.

Personally, the only times I have ever used Orange CPVC cement were the few times I used lab grade CPVC DWV pipe and fittings in commercial applications.

Well, I guess I learned something today.

I guess the best approach is to avoid using a glue that needs a primer for CPVC since building codes do not universally allow the purple stuff.

Hello Florencehere,
Did you finally get the repipe done? If so who was the contractor and how was the workmanship. I am looking for repipe in Houston. Appreciate your input.
Ven

QUOTE=doug238;8 note, you don't use primer on cpvc pipe or fittings[/QUOTE] I have to disagree, All plastic pipes and fittings NUST be primed to remove the glaze.

Should specific types of primers and solvent cements be used on a CPVC system? Are specific colors required?

CPVC solvent cement, should always be for CPVC piping and manufactured to meet the requirements of ATM F 493. Purple primer manufactured for PVC pipe is acceptable. Faster flashing CPVC primer is available(see image), and is recommended for cold weather installations. Orange CPVC solvent cement and purple primer are specifically required by certain code bodies to facilitate identification by plumbing inspectors. Unpigmented CPVC solvent cement and primers are available and are acceptable in various jurisdictions. Clear cement/primer provides neater finished appearance. One-step cements are now available and are fully satisfactory if the manufacturer's instructions are carefully followed. Your local plumbing inspector can provide a final answer to this question.
Always prime PVC, CPVC and ABS before gluing. Sorry Doug and growler, Tom