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DuraStack

®

 is a registered trademark of M&G DuraVent, Inc.

All rights reserved, 

©

2013  M&G DuraVent is a member of M&G Group. 

Customer Service Support 800-835-4429   707-446-4740 FAX   www.duravent.com

5/2012   PIDIS

Grease Duct (DIS) Limited Lifetime Warranty

Industrial and Commercial Chimney and Venting Products Limited Lifetime Warranty

This M&G DuraVent Limited Lifetime Warranty warrants your DuraStack™ – DIS stainless steel multi-fuel double-wall insulated chimney system (Product) 

in a grease duct application to be free from defects in material and workmanship at the time of manufacture when properly connected to and included 

as a part of a code-compliant commercial kitchen ventilation system for cooking appliances. This Limited Lifetime Warranty includes all components and 

fittings. After installation, if covered components manufactured by DuraVent are found to be defective in materials or workmanship during the Limited 

Lifetime Warranty period and while the Product remains at the site of the original installation, DuraVent will replace the covered components. DuraVent 

reserves the right to replace covered components with an equivalent product and the replacement must be carried out in accordance with DuraVent 

recommendations. If replacement is not commercially practical, DuraVent will, at its option, refund the purchase price or wholesale price of the DuraVent 

Product, whichever is applicable. Labor or freight costs to remove or replace DuraVent components are not included. THERE ARE EXCLUSIONS AND 

LIMITATIONS to the Limited Lifetime Warranty as described herein.

Coverage Commencement Date

Warranty coverage begins on the date of shipment from DuraVent.

Exclusions and Limitations

This Limited Lifetime Warranty applies only if the Product is installed in the United States or Canada and only if used for the application for which it was 

designed and intended. The Product must be installed and maintained in accordance with the design, installation and maintenance instructions for the 

Product and in compliance with all applicable installation and building codes and high-quality, industry accepted trade practices.

This warranty is non-transferable and extends to the original owner only. The Product must be purchased through an DuraVent Agent/Representative and proof 

of purchase must be provided.

Components and fittings (excludes labor):

Year 1-10 – Replacement of all components and fittings.

Year 11-15 – Replacement at 75% off of the prevailing list price in effect at the time of replacement (25% of the retail list price paid by the consumer).

Year 16+ – Replacement at 50% off of the prevailing list price in effect at the time of replacement (50% of the retail list price paid by the consumer).

DuraVent will not be responsible for: (a) damages caused by normal wear and tear, corrosion from salt air, accident, riot, fire, flood, high wind or acts of God; 

(b) damages caused by abuse, negligence, misuse, or unauthorized alteration or repair of the Product affecting its stability or performance; (c) damage 

resulting from failure to reasonably clean, care for or maintain products in accordance with the printed design, installation and maintenance instructions 

for the Product; (d) damages caused by failing to provide proper maintenance and service in accordance with the design, installation and maintenance 

instructions for the Product, including damage to the finish of the Product caused by the use of improper solvents/chemicals or improper cleaning methods; 

(e) damages, repairs or inefficiency resulting from faulty installation or application of the Product; (e) replacement of system sealants as a result of improper 

installation or a system grease fire.

This Limited Lifetime Warranty covers only parts as provided herein. DuraVent’s entire liability is limited to the purchase price of this Product. In no case shall DuraVent 

be responsible for materials, components or construction which are not manufactured or supplied by DuraVent or for the labor necessary to install, repair or remove 

such materials, components or construction. All replacement or repair components will be shipped F.O.B. from the DuraVent manufacturing facility.

Limitation on Liability

It is expressly agreed and understood that the sole obligation of DuraVent and the purchaser’s exclusive remedy under this warranty, under any other 

warranty, expressed or implied, or in contract, tort or otherwise, shall be limited to replacement, repair, or refund, as specified herein.

In no event shall DuraVent be liable for any incidental or consequential damages caused by defects in the Product, whether such damage occurs or is 

discovered before or after replacement or repair, and whether such damage is caused by DuraVent negligence. DuraVent makes no expressed warranties 

except as stated in this Limited Lifetime Warranty. The duration of any implied warranty is limited to the duration of this expressed warranty.  No one is 

authorized to change this Limited Lifetime Warranty or to create for DuraVent any other obligation or liability in connection with the Product. Some states 

and provinces do not allow the exclusion or limitation of incidental or consequential damages, so the above limitations or exclusions may not apply to you. 

The provisions of this Limited Lifetime Warranty are in addition to and not a modification of or subtraction from any statutory warranties and other rights 

and remedies provided by law.

Investigation of Claims Against Warranty

DuraVent reserves the right to investigate any and all claims against this Limited Lifetime Warranty and to decide, in its sole discretion, upon the method 

of settlement. DuraVent shall in no event be responsible for any warranty work done by a contractor that is not approved without first obtaining DuraVent’s 

prior written consent.

For the most up-to-date installation instructions, see duravent.com

REV 4.1.2013

Manufactured in Laval, Quebec

Summary of Contents for DuraVent DIS

Page 1: ...DuraStack DIS DAS Installation Instructions A modular double wall positive pressure chimney Boiler Breeching and Stack Engine Exhaust Grease Duct DIS only...

Page 2: ...his venting system must be supported in accordance with these instructions Check for proper joint construction when joining pipe to fittings Check for unrestricted vent movement through walls ceilings...

Page 3: ...ing Information 4 Section A General Information 4 Section B Tees Elbows Increasers 12 Section C Structural Support and Guiding 16 Section D Roof and WAll Penetrations 22 Section E Terminations Startin...

Page 4: ...tructions comprise both general guidelines and special requirements for all parts in the product line Before specifying a design or beginning an installation please carefully review these instructions...

Page 5: ...ctions and National Fire Protection Association standard NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations Surroundings Enclosure DuraVent models DIS and DA...

Page 6: ...ilding is four stories or more the enclosure wall shall have a fire resistance rating of not less than two hours 4 Combustible roofs or roof ceiling assemblies may be penetrated as described in Sectio...

Page 7: ...0 Inside 8 Inside 8 12 36 Inside 8 Not Listed Table 4 DAS Minimum Openings Model Roof Floor C Wall C 5 10 Inside 12 Inside 12 12 36 Inside 12 Not Listed warning DO NOT INSTALL ANY TYPE OF INSULATION I...

Page 8: ...able 5 for approved sealants 2 Insert the female end of another section of chimney over male end with sealant see Figure 3 3 Insert the assembly band see Figure 4 around the joint of the two sections...

Page 9: ...R EXPANSION JOINT OBSERVE ADEQUATE SAFETY MEASURES WHEN USING A DEGREASER Table 6 Maximum Chimney Heights and Support Method for Model DIS and DAS Inside Diameter Anchor Plate Anchor PlateVentilated A...

Page 10: ...10 12 26 10 8 10 12 28 10 8 10 12 30 10 8 10 12 32 10 8 10 12 34 10 8 10 12 36 10 8 10 12 MVS MaximumVertical Spacing between two guides or a support and a guide in a vertical position H Maximum free...

Page 11: ...Example Model DIS 6 diameter section of 25 feet in length from table 8 weight in lb ft 8 Total weight 8 x 25 200 lbs CHIMNEY GUYING AND bRACING 1 Proper guying and bracing is essential for part of the...

Page 12: ...or each engine or turbine Check with your engine or turbine manufacturer prior to common exhaust system design Exhaust gas from operating units tends to flow to non operating units where condensation...

Page 13: ...12 45 TEE T45 1 For systems where flow resistance must be minimized like engine or turbine exhaust The use of a 45 tee is suggested It can be combined with a 45 elbow to make a smooth 90 turn See Figu...

Page 14: ...8 12 4 When removed the old silicone must be cleaned out and a new bed of sealant must be applied Drain Tee Cap DTC 1 Use as a drain for vertical stack 2 Connect to a suitable drain fitting to allow r...

Page 15: ...lynecessary 2 Sloped offsets require more expansion joints and secure bracing above and below elbows 3 With solid fuel burning appliance the slope must not be greater than 30 from the vertical Applian...

Page 16: ...Section C 12 Re supports such as those shown in Figure 30 must be securely anchored to walls posts or locally fabricated rigid framework This framework must be designed to assure stability of attache...

Page 17: ...der the weight of the assembled parts and make sure you have a safe manner of lifting the assembly Installation Steps for First Method refer to Figure 22 1 Place the part that will be upsteam of the s...

Page 18: ...the male coupling flange of the part before the support 3 Insert the male coupling of the part in the plate opening 4 You may hold it using two clamp flanges placed at 180 and bolted to the anchor pl...

Page 19: ...tbeabletomovewithoutinterfering withtheguidewhenthermalexpansionoccurs SeeFigure27 wallguidelocation 3 Thewallguidecanbeinstalledwithawallband Figure 26 extensionforgreaterclearancesupto4 1 4 for mode...

Page 20: ...28 Wall Guide Wall Guide Wall Support MVS MVS 2 to 4 51mm to 108mm DIS 5 to 7 127mm to 184mm DAS Freestanding H max 6 to 10 Do not install expansion length in this area Wall Guide Expansion Length I...

Page 21: ...cation ROOF BRACE RB 1 The roof brace is used to stabilize the chimney where it extends more than 15 above the roof 2 It consists of one band RB and two braces supplied by the installer 3 To minimize...

Page 22: ...le 3 Minimum openings for framing dimension 3 The radiant shield of the firestop may need to be trimmed to fit the height of the roof Nominal height is 10 inches 4 Roof floor penetration components ar...

Page 23: ...of combustible construction important Crossing a combustible wall is not permitted for diameters larger than 10 inside diameter Sealant Flashing Combustible roof floor Firestop Radiant Shield 2 Clear...

Page 24: ...Flange Adaptor FA is intended for use as a connection to a class 125 or 150 ANSI pipe flange 2 This type of connection requires a flange gasket and bolt set provided by the installer The gasket and bo...

Page 25: ...aining Band and a locking band over a shank type flue gas inlet 2 First slide the retaining band over the system inlet and tighten it with supplied bolt See Figure 37a Figure 43 Appliance Outlet Inser...

Page 26: ...ged outlet The Flange Adaptor comes with beam clamps to clamp the FFHA to the appliance See Figure 42 TERMINATIONS 4 Installation is done the same manner as a standard length except for model 3 For th...

Page 27: ...t of the exhaust system The best way to accomplish this is to locate an Anchor Plate AP support at the joint between the ANSI Flange adaptor and the adjacent fitting See Figure 49 5 It is crucial that...

Page 28: ...f the exhaust 10 Low pressure systems such as boilers up to 6 inches water column can effectively use the Adjustable Length LA 11 Spacing of guides and supports when a thermal expansion part is used s...

Page 29: ...lows Bellow Joint Wall Guide Wall Support 12 Long Length Minimum With Bellows Bellow Joint Wall Guide Wall Support Suspension Band 12 Long Length Minimum With Bellows Bellow Joint Fixed Support Suspen...

Page 30: ...aphite packing is firmly registered against the inner flue See Figure 53 d Tighten all the bolts of the containing ring For each bolt use the supplied tool as a guide between the two containing rings...

Page 31: ...r casing Inner flue sealant S 2000 or S 650 is necessary depending on the flue gaz temperature 3 Installation steps a Measure the distance required for the variable length See Figure 58 b Cut the inne...

Page 32: ...Then install the locking band over those flanges See Figure 62 f Install the insulation over the inner wall DIS only See Figure 63 Figure 57 X Min 1 Min Overlap Insulation Band DIS only Compression Ba...

Page 33: ...loor Figure 64 important ACCESS REQUIREMENTS ARE SUBJECT TO CHANGE IN ACCORDANCE WITH LOCAL CODE LOCAL AUTHORITIES SHOULD BE CONSULTED FOR EXACT REQUIREMENTS USE AND INSTALLATION OF INDIVIDUAL PARTS 1...

Page 34: ...inch w c Internal Pressure Adjustable Length Adjustable Length Fixed Support 45 Tee Tee Cap Length Locking Band Variable Length Starting Adapter 45 Elbow Increaser Suspension Band Wall Firestop Drain...

Page 35: ...or above the horizontal centerline of the chimney SQUARE TO ROUND ADAPTOR 1 When the hood is equipped with a square or rectangular collar a square to round adaptor is needed to connect the round DIS c...

Page 36: ...inspection See Figure 73 3 Remove the insulation pad and set it in a safe place during the inspection See Figure 73 4 Unscrew the eight 8 wing screws and set it in a safe place See Figure 74 5 Remove...

Page 37: ...Sealant Fan Adaptor Fan Curb 5 Replace the INSULATION PAD over the inner door 6 Replace the outer door 7 Put back the six 6 wing screws and tighten them with your hands FAN ADAPTOR PLATE FAN DIS ONLY...

Page 38: ...ase duct supported by the fan adaptor plate is 15 for all diameters warning DO NOT EXCEED THE MAXIMUM LOAD LIMIT OF THE ROOF CURB OR THE ROOF MAINTENANCE 1 Grease duct is required by NFPA 96 and many...

Page 39: ...39 Section H Markings Safety Listing Labels DIS and DAS...

Page 40: ...orm withinthechimneysystem The entire chimney or exhaust system was supplied by DuraVent Exposed Galvalume and galvanized surfaces are protected with a minimum of one base coat of primer and one finis...

Page 41: ...iot fire flood high wind or acts of God b damages caused by abuse negligence misuse or unauthorized alteration or repair of the Product affecting its stability or performance c damage resulting from f...

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