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Optional re-assembly by 
installer for left hand 
operation.

Twist ‘n’ Lock 

Manual Toilets

FEATURES

Design

Twist ‘n’ lock action safety handle guards against flooding 

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and waste backflow by locking the waste outlet valve 
shut.
Reversible pump mounting allows re-assembly for left 

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hand operation by installer.
Powerful self-priming, double-acting piston pump.

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Strong swirl action for efficient flushing.

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Crevice free contours and skirted base for added 

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cleanliness and hygiene.
Contoured handle and conveniently positioned flush 

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control lever for ease of use.
Angled pump housing and long stroke for easier 

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pumping.
Spring assisted top valve closure for easier priming.

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Automatic vacuum breaker operated by flush control 

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lever for easier bowl emptying.
Constant 38mm (1

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1/2") bore waste path minimises 

blockages.
Aortic joker valve combines full 38mm (1

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1/2") bore with 

automatic back-flow prevention.
Multi-angle discharge elbow for ease of installation.

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Accessible mounting points for faster installation.

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All fastenings face front or top for superbly simple 

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servicing without need for special tools.
Renewable external seal housing for quick, clean 

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replacement of seal and piston rod guide.
Positively located gaskets ensure correct re-assembly.

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Dual function base plug combines winter drain point with 

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easy cleaning access.

APPLICATIONS

You may install JABSCO Regular and Compact bowl 
manually operated marine toilets in both power and sailing 
craft, either above or below the waterline, for use on sea, 
river, lake or canal.
Your installation may discharge the waste either overboard 
(provided that your national and local regulations allow this), 
or into a treatment system or into an on-board holding tank 
(U.S.C.G. Marine Sanitation Devices Type I, II and III).

JABSCO  manual  toilets  are  designed 
specifically  for  marine  use.  Consult  ITT 
Industries  Jabsco  for  advice  about  possible 
non-marine applications.

MATERIALS

Luxury wooden seat and cover with tough baked enamel 

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coating.
Hygienic white ceramic bowl for ease of cleaning.

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Pump and base moulded in ABS or polypropylene with 

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selected parts in acetal resin, fitted with 316 passivated 
stainless steel fastenings, brass weights and neoprene 
seals and gaskets.

Performance

Flushing pump self-primes from dry up to 1 metre (3ft) 

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below the base.
Waste pump discharges up to 3 metres (9ft) above the 

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base.

Dimensions

See the Dimensional Drawing on the back page.

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Installation Instructions

YOUR TOILET is just one part of a system. Correct 
installation of the whole system is essential if you want the 
toilet to perform properly, operate reliably and safely, and give 
satisfactory length of life.  The toilet is delivered assembled 
for right-handed operation. If you wish, both Regular and 
Compact Bowl models may be re-assembled with the pump 
on the left hand side. The seat and lid is delivered boxed and 
unfitted for its protection.
NB:   Key numbers, e.g. ('Key 31'), are references to the 

exploded view diagram on the back page.

1. Re-assembly for left hand use

If  you  wish  to  change  the  pump  mounting  from  right  to  left 
hand, do so before installing the toilet.

Pull off the hose (key 4) that runs from the pump to the 

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bowl.
Remove the 4 screws (key 31) that secure the pump 

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assembly to the base.
Lift off the pump assembly and leave the base valve 

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gasket (key 16) on its 3 locating pegs.

29090 & 29120

Model:  
29120-3000 

Manual Toilet, 
Regular Bowl

Summary of Contents for Twist n Lock

Page 1: ...ed that your national and local regulations allow this or into a treatment system or into an on board holding tank U S C G Marine Sanitation Devices Type I II and III JABSCO manual toilets are designe...

Page 2: ...aft of and higher than the inlet seacock HAZARD RISK Through Hull Fittings If the installation of the toilet results in it being connected to ANY through hull fitting that may possibly be below the wa...

Page 3: ...e supplied with the toilet which connects the flushing pump outlet tail to the elbow key 6 Rotate the intake seal key 5 so that the elbow points upwards Replace the white hose with a longer length of...

Page 4: ...n 3 Toilet waste discharging into holding tank top of holding tank above discharge elbow at anytime See Figure 3 below YOU MUST fit a 38mm 11 2 Vented loop fitting Jabsco part number 29015 0010 If the...

Page 5: ...eep the contents of the bowl low enough for comfort Use good quality hard or soft household toilet paper but do not use more than necessary After use keep the Flush Control Shut and pump until the bow...

Page 6: ...ater begins to leak around the piston rod key 29 at the top of the pump the seal assembly key 18 is worn and must be replaced YOU WILL need A Seal housing Assembly 29044 3000 Unscrew the seal housing...

Page 7: ...d bottom valve gaskets key 21 and the joker valve and renew them if they are damaged stiff or covered with scale Automatically renew the seal assembly and the piston O ring Use the other parts in the...

Page 8: ...down Open Inlet Seacock Fully open Flush Control Lever 23 Water does not come in although handle is easy to push and pull Open Flush Control Lever 23 Check Top Valve Gasket 21 and Piston O ring 30 Ch...

Page 9: ...DISCHARGE FLANGE 1 29091 1000 1 1 33 JOKER VALVE 1 29092 1000 1 1 1 34 DISCHARGE ELBOW 1 29029 1000 1 1 35 VALVE SPRING ONLY FROM 1998 1 1 1 1 1 Repair Kits Available Kit Part No Description A 29045...

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