Frequently Asked General Questions

If you have questions you do not find answered below, please contact us.

Q: What kind of products does dahl manufacture?
A: dahl manufactures mini-ball™ 1/4 turn ball valves, globe-style plumbing & heating valves, manual balancing valves for hydronic heating systems, specialty fittings and 3 styles of pipe hangers (tube straps, U-Clips and hanger strapping).

Q: How can I buy dahl products?
A: To learn the business name and location of the nearest distributor handling dahl valves, please contact us.

Q: How can I locate the dahl Manufacturer’s Sales Representative for my area?
A: Listings of our Manufacturer's Reps for Canada and the U.S.A. can be found on our dahlvalve.com website, in our catalog.

Q: If I don’t see a mini-ball™ valve with the connections that I need in your catalog, how can I find out if you can make it?
A: To find out if dahl can “custom-build” a valve with the connections you need, contact us.

Q: Where does dahl import their valves and components from?
A: dahl does not import any valves or components. We design and manufacture every dahl valve at our plant in Mississauga, Ontario, Canada.

Q: Does dahl offer full-port ball valves?
A: No. However, our Large Bore valves, in select models, will offer more than adequate flow for the majority of applications and all of our mini-ball™ valves meet the CSA & IAPMO flow requirements and have superior flow to comparable globe valves.

Q

What types of valves and related products does dahl NOT offer?

A

Gate valves
Butterfly valves
Check valves
Foot valves
Needle valves
Diverter valves
Zone valves

Control valves
Pressure relief valves
Frost-free hydrants
Valves with flange connections
Mixing valves
Industrial valves
Pneumatic valves
Valves for gas

Q: Does dahl offer sillcocks with mounting flanges?
A: No. However, dahl does offer a wide variety of hose bibbs.

Q: Does dahl offer stainless steel valves or strapping?
A: No.

Q: Does dahl manufacture or sell dielectric unions?
A: No.

Q: Can I buy parts to re-build a mini-ball™ valve?
A: No. We do not sell the components separately and disassembling the valve will void your warranty.

Q: Do I need a special tool to install the No Solder Replacement Valve?
A: No. You should need no more than a few common plumbing and hand tools.

Q: What sizes of valves does dahl offer?
A: dahl offers valves with pipe connections from 1/8” to 1-1/4”, depending on the application.

Q: Does dahl offer valves for regular PEX?
A: Yes. dahl offers valves with either crimp or compression connections for F876 PEX A, B or C.

Q: Does dahl offer valves for Wirsbo/Uponor connections?
A: Yes. This is our pipe connection that is designated by “F1960”.

Q: Does dahl offer valves for Rehau connections?
A: Yes. This is our pipe connection that is designated by “F2080”.

Q: Does dahl offer valves for iron pipe?
A: Yes. dahl offers valves with either female or male NPT connections from 1/8” to 1-1/4”, depending on the application.

Q

Does dahl offer any connections for straight threads?

A

Yes, dahl offers the following straight male threads:

1/2” BSP
1/2” NPSM
3/4” BSP (G1)

Q: Does dahl offer Stop & Waste valves?
A: Yes, dahl offers a wide variety of Stop & Waste valves. Please contact our office or your dahl Manufacturer’s Rep for details on the model you require.

Q: Does dahl offer valves with tamper-resistant operation, such as LockShield and Loose Key?
A: Yes. dahl offers a wide variety of tamper-resistant valves. Please contact our office or your dahl Manufacturer’s Rep for details on the model you require.

Q: Does dahl offer circuit balancing valves?
A: dahl offers circuit balancing valves for 1/2” and 3/4” pipe size applications, for flow rates from 0.4 to 6.0 USGPM.

Q: Does dahl offer replacement packings for their globe style valves?
A: No. dahl only sells complete cartridge assemblies because the self-adjusting spring-loaded packing system is maintenance-free and, for all valves sold after July 2008, it is covered by our 25 year warranty.

Q: How much do dahl valves cost?
A: Please contact your nearest distributor carrying dahl products for net pricing. If you are a distributor, and want to obtain pricing on dahl products, please contact us. List prices can be found in our Products catalog online.

Q: Does dahl have submittal or technical data sheets?
A: Yes. To obtain Submittal Sheets or Technical Data Sheets on specific dahl products, click on the link or contact us.

Q: What is the material/metal used for the actual ball inside the 1/4 turn shutoff valve?
A: It is a nickel plated solid brass ball.

Q: What are the Cv values for dahl valves?
A: That will vary depending on the model. For assistance in getting Cv values for specific dahl valves, contact us.

Q: Is it necessary to dissassemble a mini-ball™ valve before soldering?
A: No, do NOT dissassemble. Leave it in the open position and aim the flame away from the center of the valve body.

Q: Does the QUICK-GRIP™ connection work on Poly-B?
A: No. The stainless steel insert for PEX pipe is too small for the larger inside diameter of Poly-B.

Q: Does dahl offer valves for CPVC pipe?
A: Yes. dahl offers valves with solvent glue joint connections designed for Copper Tube Size (CTS) CPVC pipe. It is important to use mini-ball™ valves with our #46, #4466, #10 or #11 connections only. dahl does not recommend using 5/8 OD Compression connections for copper pipe on CPVC pipe.

Q: Do dahl's Copper Tube Size CPVC connections work on FlowGuard Gold?
A: Yes. FlowGuard Gold is a brand name for a line of CPVC pipe and fittings.

Q: Do dahl's Copper Tube Size CPVC connections work on IPEX Aquarise?
A: No, IPEX AquaRise is made to Iron Pipe Size similar to Schedule 40. However, dahl has provided IPEX with a list of popular mini-ball™ valves for end-of-line applications that may be useful for AquaRise installers. Visit the IPEX website at http://www.ipexinc.com and click on the AquaRise Product Bulletin link on their AquaRise product page.

Q: What are the working pressure & temperature specifications for mini-ball™ valves?
A: 250 psi and 250°F. However, this is subject to lower limitations depending on the pipe type and specific end connections that are supplied on the mini-ball™ valve.

Q: Can dahl valves be used on heating systems with a glycol & water mix?
A: Yes. dahl valves can be used in hydronic heating systems with up to a 50/50 water/glycol mix.

Q: Can we use dahl valves for gas or air?
A: No. The certifications and listings for valves used on gas and air systems are different than those for valves used for water.

Q: Can dahl valves be used for fuel or petroleum products?
A: No. The certifications and listings for valves used on gas and air systems are different than those for valves used for water. Fuels or Petroleum based substances are not compatible with seal materials.

Q: What are the working pressure & temperature specifications for your Globe/Compression Stops?
A: 200 psi and 250°F.

Q: What are the working pressure & temperature specifications for your Globe Radiator and Balancing Valves?
A: 200 psi and 250°F for the Regular Pattern series.; 250 psi and 250°F for the Heavy Pattern series; The Heavy Pattern series also comes standard with a Hi-Temp disc and is suitable for 150 Working Steam Pressure (WSP).

Q: Are dahl’s Heavy Pattern Globe Radiator and Balancing Valves suitable for one pipe steam systems?
A: No, they are not equipped with a drain in the seat and will therefore not allow proper drainage of condensate.

Q: Can dahl globe style valves be back-seated?
A: Yes. Open the valve fully (counter-clockwise) until the handle stops.

Q: Can I install a dahl globe style radiator valve backwards on the outlet of a radiator?
A: Yes. Installers have been putting these valves “backwards” on the return side of radiators for decades with no complaints. There is approximately a 5% degradation in the Cv value, which tends to have a negligible impact given the low flow rates of these applications.